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80000040 = 2335666667
BaseRepresentation
bin1001100010010…
…11010000101000
312120112102102110
410301023100220
5130440000130
611534402320
71660663161
oct461132050
9176472373
1080000040
114118123a
12229603a0
1313760403
14a8a6768
157053ab0
hex4c4b428

80000040 has 32 divisors (see below), whose sum is σ = 240000480. Its totient is φ = 21333312.

The previous prime is 80000027. The next prime is 80000059. The reversal of 80000040 is 4000008.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a super Niven number, because it is divisible the sum of any subset of its (nonzero) digits.

It is a junction number, because it is equal to n+sod(n) for n = 79999980 and 80000025.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 333214 + ... + 333453.

It is an arithmetic number, because the mean of its divisors is an integer number (7500015).

Almost surely, 280000040 is an apocalyptic number.

It is an amenable number.

80000040 is an abundant number, since it is smaller than the sum of its proper divisors (160000440).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

80000040 is a wasteful number, since it uses less digits than its factorization.

80000040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 666681 (or 666677 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 12.

The square root of 80000040 is about 8944.2741460669. The cubic root of 80000040 is about 430.8870098209.

Subtracting from 80000040 its product of nonzero digits (32), we obtain a palindrome (80000008).

Adding to 80000040 its reverse (4000008), we get a palindrome (84000048).

The spelling of 80000040 in words is "eighty million, forty", and thus it is an aban number and an uban number.

Divisors: 1 2 3 4 5 6 8 10 12 15 20 24 30 40 60 120 666667 1333334 2000001 2666668 3333335 4000002 5333336 6666670 8000004 10000005 13333340 16000008 20000010 26666680 40000020 80000040