89091878840 has 16 divisors (see below), whose sum is σ = 200456727480. Its totient is φ = 35636751520.

The previous prime is 89091878831. The next prime is 89091878879. The reversal of 89091878840 is 4887819098.

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, 1113648446 + ... + 1113648525.

Almost surely, 2^89091878840 is an apocalyptic number.

It is an amenable number.

89091878840 is an abundant number, since it is smaller than the sum of its proper divisors (111364848640).

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

89091878840 is a wasteful number, since it uses less digits than its factorization.

89091878840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2227296982 (or 2227296978 counting only the distinct ones).

The product of its (nonzero) digits is 9289728, while the sum is 62.

The spelling of 89091878840 in words is "eighty-nine billion, ninety-one million, eight hundred seventy-eight thousand, eight hundred forty".