64740744 has 24 divisors (see below), whose sum is σ = 175339710. Its totient is φ = 21580224.

The previous prime is 64740727. The next prime is 64740773. The reversal of 64740744 is 44704746.

64740744 is a `hidden beast` number, since 647 + 4 + 0 + 7 + 4 + 4 = 666.

It can be written as a sum of positive squares in only one way, i.e., 64160100 + 580644 = 8010^2 + 762^2 .

It is a tau number, because it is divible by the number of its divisors (24).

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 = 64740699 and 64740708.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 449517 + ... + 449660.

Almost surely, 2^64740744 is an apocalyptic number.

It is an amenable number.

64740744 is an abundant number, since it is smaller than the sum of its proper divisors (110598966).

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

64740744 is a wasteful number, since it uses less digits than its factorization.

64740744 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 899189 (or 899182 counting only the distinct ones).

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

The square root of 64740744 is about 8046.1633093046. The cubic root of 64740744 is about 401.5373008629.

The spelling of 64740744 in words is "sixty-four million, seven hundred forty thousand, seven hundred forty-four".