90204072 has 32 divisors (see below), whose sum is σ = 257726400. Its totient is φ = 25772544.

The previous prime is 90204071. The next prime is 90204073. The reversal of 90204072 is 27040209.

It is an interprime number because it is at equal distance from previous prime (90204071) and next prime (90204073).

It is a Harshad number since it is a multiple of its sum of digits (24).

It is not an unprimeable number, because it can be changed into a prime (90204071) 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, 268297 + ... + 268632.

It is an arithmetic number, because the mean of its divisors is an integer number (8053950).

Almost surely, 2^90204072 is an apocalyptic number.

It is an amenable number.

90204072 is an abundant number, since it is smaller than the sum of its proper divisors (167522328).

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

90204072 is a wasteful number, since it uses less digits than its factorization.

90204072 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 536945 (or 536941 counting only the distinct ones).

The product of its (nonzero) digits is 1008, while the sum is 24.

The square root of 90204072 is about 9497.5824292290. The cubic root of 90204072 is about 448.4789334992.

The spelling of 90204072 in words is "ninety million, two hundred four thousand, seventy-two".