90881902 has 8 divisors (see below), whose sum is σ = 143497800. Its totient is φ = 43049304.

The previous prime is 90881891. The next prime is 90881939. The reversal of 90881902 is 20918809.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×90881902² = 16519040222275208, which contains 22 as substring.

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, 1195777 + ... + 1195852.

It is an arithmetic number, because the mean of its divisors is an integer number (17937225).

Almost surely, 2^90881902 is an apocalyptic number.

90881902 is a deficient number, since it is larger than the sum of its proper divisors (52615898).

90881902 is a wasteful number, since it uses less digits than its factorization.

90881902 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2391650.

The product of its (nonzero) digits is 10368, while the sum is 37.

The square root of 90881902 is about 9533.1999874124. The cubic root of 90881902 is about 449.5994823124.

The spelling of 90881902 in words is "ninety million, eight hundred eighty-one thousand, nine hundred two".