71309492 has 24 divisors (see below), whose sum is σ = 136692360. Its totient is φ = 32399360.

The previous prime is 71309477. The next prime is 71309503. The reversal of 71309492 is 29490317.

It can be written as a sum of positive squares in 4 ways, for example, as 30426256 + 40883236 = 5516^2 + 6394^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16109 + ... + 20052.

It is an arithmetic number, because the mean of its divisors is an integer number (5695515).

Almost surely, 2^71309492 is an apocalyptic number.

It is an amenable number.

71309492 is a deficient number, since it is larger than the sum of its proper divisors (65382868).

71309492 is a wasteful number, since it uses less digits than its factorization.

71309492 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36211 (or 36209 counting only the distinct ones).

The product of its (nonzero) digits is 13608, while the sum is 35.

The square root of 71309492 is about 8444.4947747038. The cubic root of 71309492 is about 414.6825694743.

The spelling of 71309492 in words is "seventy-one million, three hundred nine thousand, four hundred ninety-two".