89777640 has 64 divisors (see below), whose sum is σ = 270812160. Its totient is φ = 23809280.

The previous prime is 89777627. The next prime is 89777687. The reversal of 89777640 is 4677798.

It is a self number, because there is not a number n which added to its sum of digits gives 89777640.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 20962 + ... + 24878.

It is an arithmetic number, because the mean of its divisors is an integer number (4231440).

Almost surely, 2^89777640 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 89777640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (135406080).

89777640 is an abundant number, since it is smaller than the sum of its proper divisors (181034520).

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

89777640 is a wasteful number, since it uses less digits than its factorization.

89777640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4122 (or 4118 counting only the distinct ones).

The product of its (nonzero) digits is 592704, while the sum is 48.

The square root of 89777640 is about 9475.1063318572. The cubic root of 89777640 is about 447.7711017118.

The spelling of 89777640 in words is "eighty-nine million, seven hundred seventy-seven thousand, six hundred forty".