2319778920 has 64 divisors (see below), whose sum is σ = 6968874240. Its totient is φ = 617760000.

The previous prime is 2319778907. The next prime is 2319778957. The reversal of 2319778920 is 298779132.

It is a self number, because there is not a number n which added to its sum of digits gives 2319778920.

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, 77250 + ... + 102990.

It is an arithmetic number, because the mean of its divisors is an integer number (108888660).

Almost surely, 2^2319778920 is an apocalyptic number.

2319778920 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2319778920 is an abundant number, since it is smaller than the sum of its proper divisors (4649095320).

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

2319778920 is a wasteful number, since it uses less digits than its factorization.

2319778920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26506 (or 26502 counting only the distinct ones).

The product of its (nonzero) digits is 381024, while the sum is 48.

The square root of 2319778920 is about 48164.0832986573. The cubic root of 2319778920 is about 1323.7791379263.

The spelling of 2319778920 in words is "two billion, three hundred nineteen million, seven hundred seventy-eight thousand, nine hundred twenty".