64988688 has 80 divisors (see below), whose sum is σ = 180363456. Its totient is φ = 20090880.

The previous prime is 64988659. The next prime is 64988701. The reversal of 64988688 is 88688946.

It is a super-2 number, since 2×64988688² = 8447059135922688, which contains 22 as substring.

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, 59023 + ... + 60113.

Almost surely, 2^64988688 is an apocalyptic number.

64988688 is a gapful number since it is divisible by the number (68) 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 64988688, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (90181728).

64988688 is an abundant number, since it is smaller than the sum of its proper divisors (115374768).

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

64988688 is a wasteful number, since it uses less digits than its factorization.

64988688 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1192 (or 1186 counting only the distinct ones).

The product of its digits is 5308416, while the sum is 57.

The square root of 64988688 is about 8061.5561773147. The cubic root of 64988688 is about 402.0492501725.

It can be divided in two parts, 64988 and 688, that multiplied together give a palindrome (44711744).

The spelling of 64988688 in words is "sixty-four million, nine hundred eighty-eight thousand, six hundred eighty-eight".