708891978 has 16 divisors (see below), whose sum is σ = 1428134400. Its totient is φ = 234572256.

The previous prime is 708891971. The next prime is 708891983. The reversal of 708891978 is 879198807.

It is not an unprimeable number, because it can be changed into a prime (708891971) 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, 430378 + ... + 432021.

It is an arithmetic number, because the mean of its divisors is an integer number (89258400).

Almost surely, 2^708891978 is an apocalyptic number.

708891978 is an abundant number, since it is smaller than the sum of its proper divisors (719242422).

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

708891978 is a wasteful number, since it uses less digits than its factorization.

708891978 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 862541.

The product of its (nonzero) digits is 2032128, while the sum is 57.

The square root of 708891978 is about 26625.0254084386. The cubic root of 708891978 is about 891.6478237650.

The spelling of 708891978 in words is "seven hundred eight million, eight hundred ninety-one thousand, nine hundred seventy-eight".