89887644 has 144 divisors (see below), whose sum is σ = 294018816. Its totient is φ = 23328000.

The previous prime is 89887643. The next prime is 89887649. The reversal of 89887644 is 44678898.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (89887643) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 74244 + ... + 75444.

Almost surely, 2^89887644 is an apocalyptic number.

89887644 is a gapful number since it is divisible by the number (84) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 89887644, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (147009408).

89887644 is an abundant number, since it is smaller than the sum of its proper divisors (204131172).

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

89887644 is a wasteful number, since it uses less digits than its factorization.

89887644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1238 (or 1224 counting only the distinct ones).

The product of its digits is 3096576, while the sum is 54.

The square root of 89887644 is about 9480.9094500475. The cubic root of 89887644 is about 447.9539108092.

The spelling of 89887644 in words is "eighty-nine million, eight hundred eighty-seven thousand, six hundred forty-four".