64760840 has 16 divisors (see below), whose sum is σ = 145711980. Its totient is φ = 25904320.

The previous prime is 64760831. The next prime is 64760863. The reversal of 64760840 is 4806746.

It can be written as a sum of positive squares in 2 ways, for example, as 62504836 + 2256004 = 7906^2 + 1502^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 64760840.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 809471 + ... + 809550.

Almost surely, 2^64760840 is an apocalyptic number.

It is an amenable number.

64760840 is an abundant number, since it is smaller than the sum of its proper divisors (80951140).

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

64760840 is a wasteful number, since it uses less digits than its factorization.

64760840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1619032 (or 1619028 counting only the distinct ones).

The product of its (nonzero) digits is 32256, while the sum is 35.

The square root of 64760840 is about 8047.4120063533. The cubic root of 64760840 is about 401.5788432689.

The spelling of 64760840 in words is "sixty-four million, seven hundred sixty thousand, eight hundred forty".