71600640 has 80 divisors (see below), whose sum is σ = 228922848. Its totient is φ = 19091456.

The previous prime is 71600629. The next prime is 71600653. The reversal of 71600640 is 4600617.

It is a tau number, because it is divible by the number of its divisors (80).

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a self number, because there is not a number n which added to its sum of digits gives 71600640.

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, 3019 + ... + 12341.

Almost surely, 2^71600640 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 71600640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (114461424).

71600640 is an abundant number, since it is smaller than the sum of its proper divisors (157322208).

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

71600640 is an equidigital number, since it uses as much as digits as its factorization.

71600640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9349 (or 9333 counting only the distinct ones).

The product of its (nonzero) digits is 1008, while the sum is 24.

The square root of 71600640 is about 8461.7161379947. The cubic root of 71600640 is about 415.2461693306.

The spelling of 71600640 in words is "seventy-one million, six hundred thousand, six hundred forty".