87890022 has 160 divisors (see below), whose sum is σ = 233063424. Its totient is φ = 24494400.

The previous prime is 87889961. The next prime is 87890041. The reversal of 87890022 is 22009878.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 2043933 + ... + 2043975.

Almost surely, 2^87890022 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 87890022, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (116531712).

87890022 is an abundant number, since it is smaller than the sum of its proper divisors (145173402).

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

87890022 is a wasteful number, since it uses less digits than its factorization.

87890022 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 136 (or 127 counting only the distinct ones).

The product of its (nonzero) digits is 16128, while the sum is 36.

The square root of 87890022 is about 9374.9678399448. The cubic root of 87890022 is about 444.6106462617.

The spelling of 87890022 in words is "eighty-seven million, eight hundred ninety thousand, twenty-two".