2310139978 has 4 divisors (see below), whose sum is σ = 3465209970. Its totient is φ = 1155069988.

The previous prime is 2310139943. The next prime is 2310139999. The reversal of 2310139978 is 8799310132.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 2280731049 + 29408929 = 47757^2 + 5423^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 577534993 + ... + 577534996.

Almost surely, 2^2310139978 is an apocalyptic number.

2310139978 is a deficient number, since it is larger than the sum of its proper divisors (1155069992).

2310139978 is a wasteful number, since it uses less digits than its factorization.

2310139978 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1155069991.

The product of its (nonzero) digits is 81648, while the sum is 43.

The square root of 2310139978 is about 48063.9155500257. The cubic root of 2310139978 is about 1321.9431089304.

The spelling of 2310139978 in words is "two billion, three hundred ten million, one hundred thirty-nine thousand, nine hundred seventy-eight".