90920072 has 16 divisors (see below), whose sum is σ = 173020560. Its totient is φ = 44781264.

The previous prime is 90920059. The next prime is 90920077. The reversal of 90920072 is 27002909.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (90920077) 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, 84278 + ... + 85349.

It is an arithmetic number, because the mean of its divisors is an integer number (10813785).

Almost surely, 2^90920072 is an apocalyptic number.

It is an amenable number.

90920072 is a deficient number, since it is larger than the sum of its proper divisors (82100488).

90920072 is a wasteful number, since it uses less digits than its factorization.

90920072 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 169700 (or 169696 counting only the distinct ones).

The product of its (nonzero) digits is 2268, while the sum is 29.

The square root of 90920072 is about 9535.2017283328. The cubic root of 90920072 is about 449.6624167723.

The spelling of 90920072 in words is "ninety million, nine hundred twenty thousand, seventy-two".