90221028 has 24 divisors (see below), whose sum is σ = 211579200. Its totient is φ = 29921760.

The previous prime is 90221017. The next prime is 90221051. The reversal of 90221028 is 82012209.

It is a junction number, because it is equal to n+sod(n) for n = 90220989 and 90221007.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16503 + ... + 21278.

It is an arithmetic number, because the mean of its divisors is an integer number (8815800).

Almost surely, 2^90221028 is an apocalyptic number.

It is an amenable number.

90221028 is an abundant number, since it is smaller than the sum of its proper divisors (121358172).

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

90221028 is a wasteful number, since it uses less digits than its factorization.

90221028 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37987 (or 37985 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 24.

The square root of 90221028 is about 9498.4750354991. The cubic root of 90221028 is about 448.5070324981.

The spelling of 90221028 in words is "ninety million, two hundred twenty-one thousand, twenty-eight".