71709402 has 16 divisors (see below), whose sum is σ = 148364640. Its totient is φ = 23078832.

The previous prime is 71709397. The next prime is 71709409. The reversal of 71709402 is 20490717.

It is a self number, because there is not a number n which added to its sum of digits gives 71709402.

It is not an unprimeable number, because it can be changed into a prime (71709409) 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, 205888 + ... + 206235.

It is an arithmetic number, because the mean of its divisors is an integer number (9272790).

Almost surely, 2^71709402 is an apocalyptic number.

71709402 is an abundant number, since it is smaller than the sum of its proper divisors (76655238).

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

71709402 is a wasteful number, since it uses less digits than its factorization.

71709402 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 412157.

The product of its (nonzero) digits is 3528, while the sum is 30.

The square root of 71709402 is about 8468.1404097948. The cubic root of 71709402 is about 415.4563171518.

The spelling of 71709402 in words is "seventy-one million, seven hundred nine thousand, four hundred two".