64599984 has 80 divisors (see below), whose sum is σ = 186520800. Its totient is φ = 21406464.

The previous prime is 64599973. The next prime is 64600007. The reversal of 64599984 is 48999546.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a self number, because there is not a number n which added to its sum of digits gives 64599984.

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, 98602 + ... + 99254.

It is an arithmetic number, because the mean of its divisors is an integer number (2331510).

Almost surely, 2^64599984 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 64599984, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (93260400).

64599984 is an abundant number, since it is smaller than the sum of its proper divisors (121920816).

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

64599984 is a wasteful number, since it uses less digits than its factorization.

64599984 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 899 (or 887 counting only the distinct ones).

The product of its digits is 2799360, while the sum is 54.

The square root of 64599984 is about 8037.4115236188. The cubic root of 64599984 is about 401.2460808421.

The spelling of 64599984 in words is "sixty-four million, five hundred ninety-nine thousand, nine hundred eighty-four".