64736940 has 48 divisors (see below), whose sum is σ = 181698048. Its totient is φ = 17221824.

The previous prime is 64736899. The next prime is 64736963. The reversal of 64736940 is 4963746.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 30349 + ... + 32411.

It is an arithmetic number, because the mean of its divisors is an integer number (3785376).

Almost surely, 2^64736940 is an apocalyptic number.

64736940 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

64736940 is an abundant number, since it is smaller than the sum of its proper divisors (116961108).

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

64736940 is a wasteful number, since it uses less digits than its factorization.

64736940 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2598 (or 2596 counting only the distinct ones).

The product of its (nonzero) digits is 108864, while the sum is 39.

The square root of 64736940 is about 8045.9269198769. The cubic root of 64736940 is about 401.5294362750.

The spelling of 64736940 in words is "sixty-four million, seven hundred thirty-six thousand, nine hundred forty".