71720430 has 32 divisors (see below), whose sum is σ = 176783904. Its totient is φ = 18608256.

The previous prime is 71720413. The next prime is 71720443. The reversal of 71720430 is 3402717.

It is a self number, because there is not a number n which added to its sum of digits gives 71720430.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 31197 + ... + 33416.

It is an arithmetic number, because the mean of its divisors is an integer number (5524497).

Almost surely, 2^71720430 is an apocalyptic number.

71720430 is an abundant number, since it is smaller than the sum of its proper divisors (105063474).

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

71720430 is a wasteful number, since it uses less digits than its factorization.

71720430 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 64660.

The product of its (nonzero) digits is 1176, while the sum is 24.

The square root of 71720430 is about 8468.7915312635. The cubic root of 71720430 is about 415.4776133710.

The spelling of 71720430 in words is "seventy-one million, seven hundred twenty thousand, four hundred thirty".