64727944 has 8 divisors (see below), whose sum is σ = 121364910. Its totient is φ = 32363968.

The previous prime is 64727933. The next prime is 64728019. The reversal of 64727944 is 44972746.

It can be written as a sum of positive squares in only one way, i.e., 63011844 + 1716100 = 7938^2 + 1310^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a self number, because there is not a number n which added to its sum of digits gives 64727944.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4045489 + ... + 4045504.

Almost surely, 2^64727944 is an apocalyptic number.

It is an amenable number.

64727944 is a deficient number, since it is larger than the sum of its proper divisors (56636966).

64727944 is a wasteful number, since it uses less digits than its factorization.

64727944 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8090999 (or 8090995 counting only the distinct ones).

The product of its digits is 338688, while the sum is 43.

The square root of 64727944 is about 8045.3678598309. The cubic root of 64727944 is about 401.5108362498.

The spelling of 64727944 in words is "sixty-four million, seven hundred twenty-seven thousand, nine hundred forty-four".