2220651378 has 24 divisors (see below), whose sum is σ = 5248812816. Its totient is φ = 672924600.

The previous prime is 2220651373. The next prime is 2220651421. The reversal of 2220651378 is 8731560222.

2220651378 is a `hidden beast` number, since 2 + 220 + 65 + 1 + 378 = 666.

It is a super-2 number, since 2×2220651378² = 9862585085226597768, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (2220651373) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 5607508 + ... + 5607903.

It is an arithmetic number, because the mean of its divisors is an integer number (218700534).

Almost surely, 2^2220651378 is an apocalyptic number.

2220651378 is an abundant number, since it is smaller than the sum of its proper divisors (3028161438).

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

2220651378 is a wasteful number, since it uses less digits than its factorization.

2220651378 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11215430 (or 11215427 counting only the distinct ones).

The product of its (nonzero) digits is 40320, while the sum is 36.

The square root of 2220651378 is about 47123.7878146483. The cubic root of 2220651378 is about 1304.6483255494.

The spelling of 2220651378 in words is "two billion, two hundred twenty million, six hundred fifty-one thousand, three hundred seventy-eight".