64939800 has 48 divisors (see below), whose sum is σ = 201315240. Its totient is φ = 17317120.

The previous prime is 64939783. The next prime is 64939801. The reversal of 64939800 is 893946.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64939801) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 53517 + ... + 54716.

Almost surely, 2^64939800 is an apocalyptic number.

64939800 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

64939800 is an abundant number, since it is smaller than the sum of its proper divisors (136375440).

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

64939800 is a wasteful number, since it uses less digits than its factorization.

64939800 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 108252 (or 108243 counting only the distinct ones).

The product of its (nonzero) digits is 46656, while the sum is 39.

The square root of 64939800 is about 8058.5234379507. The cubic root of 64939800 is about 401.9484104981.

The spelling of 64939800 in words is "sixty-four million, nine hundred thirty-nine thousand, eight hundred".