64774140 has 24 divisors (see below), whose sum is σ = 181367760. Its totient is φ = 17273088.

The previous prime is 64774133. The next prime is 64774169. The reversal of 64774140 is 4147746.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 539725 + ... + 539844.

It is an arithmetic number, because the mean of its divisors is an integer number (7556990).

Almost surely, 2^64774140 is an apocalyptic number.

64774140 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

64774140 is an abundant number, since it is smaller than the sum of its proper divisors (116593620).

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

64774140 is a wasteful number, since it uses less digits than its factorization.

64774140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1079581 (or 1079579 counting only the distinct ones).

The product of its (nonzero) digits is 18816, while the sum is 33.

The square root of 64774140 is about 8048.2383165510. The cubic root of 64774140 is about 401.6063322732.

The spelling of 64774140 in words is "sixty-four million, seven hundred seventy-four thousand, one hundred forty".