64693900 has 72 divisors (see below), whose sum is σ = 148740480. Its totient is φ = 24384000.

The previous prime is 64693897. The next prime is 64693901. The reversal of 64693900 is 939646.

It is a Smith number, since the sum of its digits (37) coincides with the sum of the digits of its prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 64693900.

It is not an unprimeable number, because it can be changed into a prime (64693901) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 126846 + ... + 127354.

It is an arithmetic number, because the mean of its divisors is an integer number (2065840).

Almost surely, 2^64693900 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 64693900, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (74370240).

64693900 is an abundant number, since it is smaller than the sum of its proper divisors (84046580).

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

64693900 is a wasteful number, since it uses less digits than its factorization.

64693900 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 595 (or 588 counting only the distinct ones).

The product of its (nonzero) digits is 34992, while the sum is 37.

The square root of 64693900 is about 8043.2518299504. The cubic root of 64693900 is about 401.4404316651.

The spelling of 64693900 in words is "sixty-four million, six hundred ninety-three thousand, nine hundred".