2391278280 has 64 divisors (see below), whose sum is σ = 7221398400. Its totient is φ = 633446400.

The previous prime is 2391278249. The next prime is 2391278311. The reversal of 2391278280 is 828721932.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (2391278249) and next prime (2391278311).

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, 47865 + ... + 84104.

It is an arithmetic number, because the mean of its divisors is an integer number (112834350).

Almost surely, 2^2391278280 is an apocalyptic number.

2391278280 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2391278280 is an abundant number, since it is smaller than the sum of its proper divisors (4830120120).

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

2391278280 is a wasteful number, since it uses less digits than its factorization.

2391278280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 132134 (or 132130 counting only the distinct ones).

The product of its (nonzero) digits is 96768, while the sum is 42.

The square root of 2391278280 is about 48900.6981545254. The cubic root of 2391278280 is about 1337.2420963701.

The spelling of 2391278280 in words is "two billion, three hundred ninety-one million, two hundred seventy-eight thousand, two hundred eighty".