64839000 has 64 divisors (see below), whose sum is σ = 202307040. Its totient is φ = 17289600.

The previous prime is 64838927. The next prime is 64839017. The reversal of 64839000 is 93846.

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 polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7807 + ... + 13806.

Almost surely, 2^64839000 is an apocalyptic number.

64839000 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

64839000 is an abundant number, since it is smaller than the sum of its proper divisors (137468040).

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

64839000 is a wasteful number, since it uses less digits than its factorization.

64839000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21637 (or 21623 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 30.

The square root of 64839000 is about 8052.2667616020. The cubic root of 64839000 is about 401.7403337811.

The spelling of 64839000 in words is "sixty-four million, eight hundred thirty-nine thousand".