64388100 has 72 divisors (see below), whose sum is σ = 212916928. Its totient is φ = 14716800.

The previous prime is 64388087. The next prime is 64388119. The reversal of 64388100 is 188346.

It is a happy number.

64388100 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×64388100² = 8291654843220000, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 13231 + ... + 17430.

Almost surely, 2^64388100 is an apocalyptic number.

64388100 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

64388100 is an abundant number, since it is smaller than the sum of its proper divisors (148528828).

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

64388100 is a wasteful number, since it uses less digits than its factorization.

64388100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30685 (or 30678 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 30.

The square root of 64388100 is about 8024.2195882216. The cubic root of 64388100 is about 400.8069128014.

The spelling of 64388100 in words is "sixty-four million, three hundred eighty-eight thousand, one hundred".