2291284978 has 16 divisors (see below), whose sum is σ = 3614607360. Its totient is φ = 1087200576.

The previous prime is 2291284951. The next prime is 2291284987. The reversal of 2291284978 is 8794821922.

It is a happy 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, 190263 + ... + 201946.

It is an arithmetic number, because the mean of its divisors is an integer number (225912960).

Almost surely, 2^2291284978 is an apocalyptic number.

2291284978 is a deficient number, since it is larger than the sum of its proper divisors (1323322382).

2291284978 is a wasteful number, since it uses less digits than its factorization.

2291284978 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 392361.

The product of its digits is 1161216, while the sum is 52.

The square root of 2291284978 is about 47867.3686137018. The cubic root of 2291284978 is about 1318.3367822313.

The spelling of 2291284978 in words is "two billion, two hundred ninety-one million, two hundred eighty-four thousand, nine hundred seventy-eight".