64385740 has 24 divisors (see below), whose sum is σ = 141089760. Its totient is φ = 24634368.

The previous prime is 64385693. The next prime is 64385777. The reversal of 64385740 is 4758346.

It is a self number, because there is not a number n which added to its sum of digits gives 64385740.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 69525 + ... + 70444.

It is an arithmetic number, because the mean of its divisors is an integer number (5878740).

Almost surely, 2^64385740 is an apocalyptic number.

It is an amenable number.

64385740 is an abundant number, since it is smaller than the sum of its proper divisors (76704020).

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

64385740 is a wasteful number, since it uses less digits than its factorization.

64385740 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 140001 (or 139999 counting only the distinct ones).

The product of its (nonzero) digits is 80640, while the sum is 37.

The square root of 64385740 is about 8024.0725320750. The cubic root of 64385740 is about 400.8020158517.

The spelling of 64385740 in words is "sixty-four million, three hundred eighty-five thousand, seven hundred forty".