47945864 has 8 divisors (see below), whose sum is σ = 89898510. Its totient is φ = 23972928.

The previous prime is 47945861. The next prime is 47945879. The reversal of 47945864 is 46854974.

It can be written as a sum of positive squares in only one way, i.e., 24423364 + 23522500 = 4942^2 + 4850^2 .

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

It is not an unprimeable number, because it can be changed into a prime (47945861) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2996609 + ... + 2996624.

Almost surely, 2^47945864 is an apocalyptic number.

It is an amenable number.

47945864 is a deficient number, since it is larger than the sum of its proper divisors (41952646).

47945864 is a wasteful number, since it uses less digits than its factorization.

47945864 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5993239 (or 5993235 counting only the distinct ones).

The product of its digits is 967680, while the sum is 47.

The square root of 47945864 is about 6924.2951987910. The cubic root of 47945864 is about 363.2874398916.

The spelling of 47945864 in words is "forty-seven million, nine hundred forty-five thousand, eight hundred sixty-four".