90056428 has 72 divisors (see below), whose sum is σ = 208544000. Its totient is φ = 33216480.

The previous prime is 90056423. The next prime is 90056441. The reversal of 90056428 is 82465009.

It is a happy number.

It is a super-2 number, since 2×90056428² = 16220320448238368, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 90056393 and 90056402.

It is not an unprimeable number, because it can be changed into a prime (90056423) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 63673 + ... + 65071.

Almost surely, 2^90056428 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 90056428, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (104272000).

90056428 is an abundant number, since it is smaller than the sum of its proper divisors (118487572).

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

90056428 is a wasteful number, since it uses less digits than its factorization.

90056428 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1451 (or 1438 counting only the distinct ones).

The product of its (nonzero) digits is 17280, while the sum is 34.

The square root of 90056428 is about 9489.8065312207. The cubic root of 90056428 is about 448.2341131283.

The spelling of 90056428 in words is "ninety million, fifty-six thousand, four hundred twenty-eight".