71609740 has 12 divisors (see below), whose sum is σ = 150380496. Its totient is φ = 28643888.

The previous prime is 71609737. The next prime is 71609761. The reversal of 71609740 is 4790617.

It is a junction number, because it is equal to n+sod(n) for n = 71609696 and 71609705.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1790224 + ... + 1790263.

It is an arithmetic number, because the mean of its divisors is an integer number (12531708).

Almost surely, 2^71609740 is an apocalyptic number.

It is an amenable number.

71609740 is an abundant number, since it is smaller than the sum of its proper divisors (78770756).

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

71609740 is a wasteful number, since it uses less digits than its factorization.

71609740 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3580496 (or 3580494 counting only the distinct ones).

The product of its (nonzero) digits is 10584, while the sum is 34.

The square root of 71609740 is about 8462.2538368924. The cubic root of 71609740 is about 415.2637603283.

It can be divided in two parts, 7160 and 9740, that added together give a square (16900 = 130²).

The spelling of 71609740 in words is "seventy-one million, six hundred nine thousand, seven hundred forty".