780820964 has 48 divisors (see below), whose sum is σ = 1739888640. Its totient is φ = 297737760.

The previous prime is 780820949. The next prime is 780820973. The reversal of 780820964 is 469028087.

It is a Harshad number since it is a multiple of its sum of digits (44).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 12494 + ... + 41445.

It is an arithmetic number, because the mean of its divisors is an integer number (36247680).

Almost surely, 2^780820964 is an apocalyptic number.

It is an amenable number.

780820964 is an abundant number, since it is smaller than the sum of its proper divisors (959067676).

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

780820964 is a wasteful number, since it uses less digits than its factorization.

780820964 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54008 (or 54006 counting only the distinct ones).

The product of its (nonzero) digits is 193536, while the sum is 44.

The square root of 780820964 is about 27943.1738354826. The cubic root of 780820964 is about 920.8392483603.

The spelling of 780820964 in words is "seven hundred eighty million, eight hundred twenty thousand, nine hundred sixty-four".