64276840 has 16 divisors (see below), whose sum is σ = 144622980. Its totient is φ = 25710720.

The previous prime is 64276819. The next prime is 64276843. The reversal of 64276840 is 4867246.

64276840 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 61434244 + 2842596 = 7838^2 + 1686^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 64276840.

It is not an unprimeable number, because it can be changed into a prime (64276843) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 803421 + ... + 803500.

Almost surely, 2^64276840 is an apocalyptic number.

It is an amenable number.

64276840 is an abundant number, since it is smaller than the sum of its proper divisors (80346140).

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

64276840 is a wasteful number, since it uses less digits than its factorization.

64276840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1606932 (or 1606928 counting only the distinct ones).

The product of its (nonzero) digits is 64512, while the sum is 37.

The square root of 64276840 is about 8017.2838293277. The cubic root of 64276840 is about 400.5759203913.

The spelling of 64276840 in words is "sixty-four million, two hundred seventy-six thousand, eight hundred forty".