64783140 has 48 divisors (see below), whose sum is σ = 182035392. Its totient is φ = 17214336.

The previous prime is 64783133. The next prime is 64783153. The reversal of 64783140 is 4138746.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 16662 + ... + 20178.

It is an arithmetic number, because the mean of its divisors is an integer number (3792404).

Almost surely, 2^64783140 is an apocalyptic number.

64783140 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

64783140 is an abundant number, since it is smaller than the sum of its proper divisors (117252252).

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

64783140 is a wasteful number, since it uses less digits than its factorization.

64783140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3836 (or 3834 counting only the distinct ones).

The product of its (nonzero) digits is 16128, while the sum is 33.

The square root of 64783140 is about 8048.7974257028. The cubic root of 64783140 is about 401.6249317204.

The spelling of 64783140 in words is "sixty-four million, seven hundred eighty-three thousand, one hundred forty".