88391644 has 12 divisors (see below), whose sum is σ = 168747768. Its totient is φ = 40178000.

The previous prime is 88391609. The next prime is 88391647. The reversal of 88391644 is 44619388.

It is a self number, because there is not a number n which added to its sum of digits gives 88391644.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (88391647) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1004407 + ... + 1004494.

It is an arithmetic number, because the mean of its divisors is an integer number (14062314).

Almost surely, 2^88391644 is an apocalyptic number.

It is an amenable number.

88391644 is a deficient number, since it is larger than the sum of its proper divisors (80356124).

88391644 is a wasteful number, since it uses less digits than its factorization.

88391644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2008916 (or 2008914 counting only the distinct ones).

The product of its digits is 165888, while the sum is 43.

The square root of 88391644 is about 9401.6830408177. The cubic root of 88391644 is about 445.4548965252.

The spelling of 88391644 in words is "eighty-eight million, three hundred ninety-one thousand, six hundred forty-four".