90218428 has 12 divisors (see below), whose sum is σ = 159331480. Its totient is φ = 44695152.

The previous prime is 90218413. The next prime is 90218459. The reversal of 90218428 is 82481209.

It is a hoax number, since the sum of its digits (34) coincides with the sum of the digits of its distinct prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 90218393 and 90218402.

It is a congruent number.

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, 103026 + ... + 103897.

Almost surely, 2^90218428 is an apocalyptic number.

It is an amenable number.

90218428 is a deficient number, since it is larger than the sum of its proper divisors (69113052).

90218428 is a wasteful number, since it uses less digits than its factorization.

90218428 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 207036 (or 207034 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 34.

The square root of 90218428 is about 9498.3381704380. The cubic root of 90218428 is about 448.5027240809.

The spelling of 90218428 in words is "ninety million, two hundred eighteen thousand, four hundred twenty-eight".