90765420 has 48 divisors (see below), whose sum is σ = 255238368. Its totient is φ = 24099840.

The previous prime is 90765407. The next prime is 90765439. The reversal of 90765420 is 2456709.

It is a super-2 number, since 2×90765420² = 16476722935552800, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11322 + ... + 17598.

It is an arithmetic number, because the mean of its divisors is an integer number (5317466).

Almost surely, 2^90765420 is an apocalyptic number.

It is an amenable number.

90765420 is an abundant number, since it is smaller than the sum of its proper divisors (164472948).

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

90765420 is a wasteful number, since it uses less digits than its factorization.

90765420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6530 (or 6528 counting only the distinct ones).

The product of its (nonzero) digits is 15120, while the sum is 33.

The square root of 90765420 is about 9527.0887473561. The cubic root of 90765420 is about 449.4073185051.

The spelling of 90765420 in words is "ninety million, seven hundred sixty-five thousand, four hundred twenty".