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30988741 = 75717753
BaseRepresentation
bin111011000110…
…1100111000101
32011022101120011
41312031213011
530413114431
63024110221
7524254120
oct166154705
964271504
1030988741
1116546333
12a465371
136560044
1441893b7
152ac1cb1
hex1d8d9c5

30988741 has 8 divisors (see below), whose sum is σ = 35482304. Its totient is φ = 26511840.

The previous prime is 30988723. The next prime is 30988759. The reversal of 30988741 is 14788903.

It is an interprime number because it is at equal distance from previous prime (30988723) and next prime (30988759).

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

It is a cyclic number.

It is not a de Polignac number, because 30988741 - 213 = 30980549 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 30988694 and 30988703.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30988241) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 121 + ... + 7873.

It is an arithmetic number, because the mean of its divisors is an integer number (4435288).

Almost surely, 230988741 is an apocalyptic number.

It is an amenable number.

30988741 is a deficient number, since it is larger than the sum of its proper divisors (4493563).

30988741 is an equidigital number, since it uses as much as digits as its factorization.

30988741 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8331.

The product of its (nonzero) digits is 48384, while the sum is 40.

The square root of 30988741 is about 5566.7531829604. The cubic root of 30988741 is about 314.1000296611.

The spelling of 30988741 in words is "thirty million, nine hundred eighty-eight thousand, seven hundred forty-one".

Divisors: 1 7 571 3997 7753 54271 4426963 30988741