715891840 has 64 divisors (see below), whose sum is σ = 1740528000. Its totient is φ = 281488384.

The previous prime is 715891817. The next prime is 715891889. The reversal of 715891840 is 48198517.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (64).

It is a super-2 number, since 2×715891840² = 1025002253157171200, which contains 22 as substring.

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, 28281 + ... + 47239.

It is an arithmetic number, because the mean of its divisors is an integer number (27195750).

Almost surely, 2^715891840 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 715891840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (870264000).

715891840 is an abundant number, since it is smaller than the sum of its proper divisors (1024636160).

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

715891840 is a wasteful number, since it uses less digits than its factorization.

715891840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19037 (or 19025 counting only the distinct ones).

The product of its (nonzero) digits is 80640, while the sum is 43.

The square root of 715891840 is about 26756.1551796965. The cubic root of 715891840 is about 894.5730368836.

The spelling of 715891840 in words is "seven hundred fifteen million, eight hundred ninety-one thousand, eight hundred forty".