64474740 has 72 divisors (see below), whose sum is σ = 213359328. Its totient is φ = 15629760.

The previous prime is 64474723. The next prime is 64474763. The reversal of 64474740 is 4747446.

64474740 is a `hidden beast` number, since 644 + 7 + 4 + 7 + 4 + 0 = 666.

It is a Smith number, since the sum of its digits (36) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 64474695 and 64474704.

It is a congruent number.

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 23 ways as a sum of consecutive naturals, for example, 14302 + ... + 18261.

It is an arithmetic number, because the mean of its divisors is an integer number (2963324).

Almost surely, 2^64474740 is an apocalyptic number.

64474740 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

64474740 is an abundant number, since it is smaller than the sum of its proper divisors (148884588).

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

64474740 is a wasteful number, since it uses less digits than its factorization.

64474740 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32589 (or 32584 counting only the distinct ones).

The product of its (nonzero) digits is 75264, while the sum is 36.

The square root of 64474740 is about 8029.6164291951. The cubic root of 64474740 is about 400.9866061865.

The spelling of 64474740 in words is "sixty-four million, four hundred seventy-four thousand, seven hundred forty".