90712930 has 32 divisors (see below), whose sum is σ = 203575680. Its totient is φ = 28273920.

The previous prime is 90712907. The next prime is 90712933. The reversal of 90712930 is 3921709.

It is a junction number, because it is equal to n+sod(n) for n = 90712892 and 90712901.

It is not an unprimeable number, because it can be changed into a prime (90712933) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 58135 + ... + 59674.

It is an arithmetic number, because the mean of its divisors is an integer number (6361740).

Almost surely, 2^90712930 is an apocalyptic number.

90712930 is an abundant number, since it is smaller than the sum of its proper divisors (112862750).

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

90712930 is a wasteful number, since it uses less digits than its factorization.

90712930 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 117834.

The product of its (nonzero) digits is 3402, while the sum is 31.

The square root of 90712930 is about 9524.3335724868. Note that the first 3 decimals coincide. The cubic root of 90712930 is about 449.3206704590.

The spelling of 90712930 in words is "ninety million, seven hundred twelve thousand, nine hundred thirty".