64400796 has 18 divisors (see below), whose sum is σ = 162790992. Its totient is φ = 21466920.

The previous prime is 64400789. The next prime is 64400803. The reversal of 64400796 is 69700446.

64400796 is a `hidden beast` number, since 644 + 0 + 0 + 7 + 9 + 6 = 666.

It is an interprime number because it is at equal distance from previous prime (64400789) and next prime (64400803).

It is a tau number, because it is divible by the number of its divisors (18).

It is a Harshad number since it is a multiple of its sum of digits (36), and also a Moran number because the ratio is a prime number: 1788911 = 64400796 / (6 + 4 + 4 + 0 + 0 + 7 + 9 + 6).

It is a self number, because there is not a number n which added to its sum of digits gives 64400796.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 894420 + ... + 894491.

It is an arithmetic number, because the mean of its divisors is an integer number (9043944).

Almost surely, 2^64400796 is an apocalyptic number.

It is an amenable number.

64400796 is an abundant number, since it is smaller than the sum of its proper divisors (98390196).

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

64400796 is a wasteful number, since it uses less digits than its factorization.

64400796 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1788921 (or 1788916 counting only the distinct ones).

The product of its (nonzero) digits is 36288, while the sum is 36.

The square root of 64400796 is about 8025.0106541985. The cubic root of 64400796 is about 400.8332546780.

The spelling of 64400796 in words is "sixty-four million, four hundred thousand, seven hundred ninety-six".