320777880 has 32 divisors (see below), whose sum is σ = 962334000. Its totient is φ = 85540736.

The previous prime is 320777861. The next prime is 320777909. The reversal of 320777880 is 88777023.

It is a hoax number, since the sum of its digits (42) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

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, 1336455 + ... + 1336694.

Almost surely, 2^320777880 is an apocalyptic number.

320777880 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

320777880 is an abundant number, since it is smaller than the sum of its proper divisors (641556120).

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

320777880 is a wasteful number, since it uses less digits than its factorization.

320777880 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2673163 (or 2673159 counting only the distinct ones).

The product of its (nonzero) digits is 131712, while the sum is 42.

The square root of 320777880 is about 17910.2730297447. The cubic root of 320777880 is about 684.5441618908.

The spelling of 320777880 in words is "three hundred twenty million, seven hundred seventy-seven thousand, eight hundred eighty".