2312720778 has 16 divisors (see below), whose sum is σ = 4625935200. Its totient is φ = 770824656.

The previous prime is 2312720759. The next prime is 2312720819. The reversal of 2312720778 is 8770272132.

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, 73273 + ... + 99971.

It is an arithmetic number, because the mean of its divisors is an integer number (289120950).

Almost surely, 2^2312720778 is an apocalyptic number.

2312720778 is an abundant number, since it is smaller than the sum of its proper divisors (2313214422).

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

2312720778 is a wasteful number, since it uses less digits than its factorization.

2312720778 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41141.

The product of its (nonzero) digits is 65856, while the sum is 39.

The square root of 2312720778 is about 48090.7556397277. The cubic root of 2312720778 is about 1322.4352004823.

The spelling of 2312720778 in words is "two billion, three hundred twelve million, seven hundred twenty thousand, seven hundred seventy-eight".