71989480 has 32 divisors (see below), whose sum is σ = 170503200. Its totient is φ = 27279936.

The previous prime is 71989453. The next prime is 71989487. The reversal of 71989480 is 8498917.

It is a happy number.

It is a Smith number, since the sum of its digits (46) coincides with the sum of the digits of its prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 71989480.

It is not an unprimeable number, because it can be changed into a prime (71989487) 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, 46602 + ... + 48121.

It is an arithmetic number, because the mean of its divisors is an integer number (5328225).

Almost surely, 2^71989480 is an apocalyptic number.

It is an amenable number.

71989480 is an abundant number, since it is smaller than the sum of its proper divisors (98513720).

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

71989480 is a wasteful number, since it uses less digits than its factorization.

71989480 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 94753 (or 94749 counting only the distinct ones).

The product of its (nonzero) digits is 145152, while the sum is 46.

The square root of 71989480 is about 8484.6614546486. The cubic root of 71989480 is about 415.9965020662.

The spelling of 71989480 in words is "seventy-one million, nine hundred eighty-nine thousand, four hundred eighty".