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40005642 = 236667607
BaseRepresentation
bin1001100010011…
…1000000001010
32210021111102110
42120213000022
540220140032
63545243150
7664020345
oct230470012
983244373
1040005642
1120644916
12114934b6
1383992a1
14545545c
1537a37cc
hex262700a

40005642 has 8 divisors (see below), whose sum is σ = 80011296. Its totient is φ = 13335212.

The previous prime is 40005611. The next prime is 40005643. The reversal of 40005642 is 24650004.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

40005642 is an admirable number.

It is not an unprimeable number, because it can be changed into a prime (40005643) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3333798 + ... + 3333809.

It is an arithmetic number, because the mean of its divisors is an integer number (10001412).

Almost surely, 240005642 is an apocalyptic number.

40005642 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

40005642 is a wasteful number, since it uses less digits than its factorization.

40005642 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6667612.

The product of its (nonzero) digits is 960, while the sum is 21.

The square root of 40005642 is about 6325.0013438734. The cubic root of 40005642 is about 342.0112680532.

Adding to 40005642 its reverse (24650004), we get a palindrome (64655646).

The spelling of 40005642 in words is "forty million, five thousand, six hundred forty-two".

Divisors: 1 2 3 6 6667607 13335214 20002821 40005642