90825420 has 72 divisors (see below), whose sum is σ = 295840944. Its totient is φ = 20759424.

The previous prime is 90825353. The next prime is 90825437. The reversal of 90825420 is 2452809.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 12507 + ... + 18386.

It is an arithmetic number, because the mean of its divisors is an integer number (4108902).

Almost surely, 2^90825420 is an apocalyptic number.

It is an amenable number.

90825420 is an abundant number, since it is smaller than the sum of its proper divisors (205015524).

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

90825420 is a wasteful number, since it uses less digits than its factorization.

90825420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30919 (or 30910 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 30.

The square root of 90825420 is about 9530.2371429047. The cubic root of 90825420 is about 449.5063228019.

The spelling of 90825420 in words is "ninety million, eight hundred twenty-five thousand, four hundred twenty".