716534640 has 160 divisors (see below), whose sum is σ = 2575549440. Its totient is φ = 182755584.

The previous prime is 716534603. The next prime is 716534647. The reversal of 716534640 is 46435617.

It is a happy number.

716534640 is a `hidden beast` number, since 7 + 1 + 6 + 5 + 3 + 4 + 640 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 716534595 and 716534604.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (716534647) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 42469 + ... + 56891.

It is an arithmetic number, because the mean of its divisors is an integer number (16097184).

Almost surely, 2^716534640 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 716534640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1287774720).

716534640 is an abundant number, since it is smaller than the sum of its proper divisors (1859014800).

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

716534640 is a wasteful number, since it uses less digits than its factorization.

716534640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14468 (or 14456 counting only the distinct ones).

The product of its (nonzero) digits is 60480, while the sum is 36.

The square root of 716534640 is about 26768.1646737314. The cubic root of 716534640 is about 894.8407027956.

The spelling of 716534640 in words is "seven hundred sixteen million, five hundred thirty-four thousand, six hundred forty".