71137960 has 32 divisors (see below), whose sum is σ = 160655400. Its totient is φ = 28349440.

The previous prime is 71137951. The next prime is 71137961. The reversal of 71137960 is 6973117.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 67272804 + 3865156 = 8202^2 + 1966^2 .

It is not an unprimeable number, because it can be changed into a prime (71137961) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8076 + ... + 14404.

Almost surely, 2^71137960 is an apocalyptic number.

It is an amenable number.

71137960 is an abundant number, since it is smaller than the sum of its proper divisors (89517440).

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

71137960 is a wasteful number, since it uses less digits than its factorization.

71137960 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6621 (or 6617 counting only the distinct ones).

The product of its (nonzero) digits is 7938, while the sum is 34.

The square root of 71137960 is about 8434.3322201583. The cubic root of 71137960 is about 414.3498019874.

The spelling of 71137960 in words is "seventy-one million, one hundred thirty-seven thousand, nine hundred sixty".