71788964 has 12 divisors (see below), whose sum is σ = 135294684. Its totient is φ = 33133344.

The previous prime is 71788961. The next prime is 71788987. The reversal of 71788964 is 46988717.

It can be written as a sum of positive squares in 2 ways, for example, as 36481600 + 35307364 = 6040^2 + 5942^2 .

It is not an unprimeable number, because it can be changed into a prime (71788961) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 690227 + ... + 690330.

It is an arithmetic number, because the mean of its divisors is an integer number (11274557).

Almost surely, 2^71788964 is an apocalyptic number.

It is an amenable number.

71788964 is a deficient number, since it is larger than the sum of its proper divisors (63505720).

71788964 is a wasteful number, since it uses less digits than its factorization.

71788964 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1380574 (or 1380572 counting only the distinct ones).

The product of its digits is 677376, while the sum is 50.

The square root of 71788964 is about 8472.8368330802. The cubic root of 71788964 is about 415.6099107643.

The spelling of 71788964 in words is "seventy-one million, seven hundred eighty-eight thousand, nine hundred sixty-four".