90002028 has 12 divisors (see below), whose sum is σ = 210004760. Its totient is φ = 30000672.

The previous prime is 90001999. The next prime is 90002041. The reversal of 90002028 is 82020009.

It is a tau number, because it is divible by the number of its divisors (12).

It is a super-2 number, since 2×90002028² = 16200730088225568, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 90001995 and 90002013.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3750073 + ... + 3750096.

Almost surely, 2^90002028 is an apocalyptic number.

It is an amenable number.

90002028 is an abundant number, since it is smaller than the sum of its proper divisors (120002732).

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

90002028 is a wasteful number, since it uses less digits than its factorization.

90002028 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7500176 (or 7500174 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 21.

The square root of 90002028 is about 9486.9398648879. The cubic root of 90002028 is about 448.1438406633.

The spelling of 90002028 in words is "ninety million, two thousand, twenty-eight".