1226918372 has 24 divisors (see below), whose sum is σ = 2276279040. Its totient is φ = 577622880.

The previous prime is 1226918353. The next prime is 1226918377. The reversal of 1226918372 is 2738196221.

It is a super-2 number, since 2×1226918372² = 3010657383102260768, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1226918377) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 129122 + ... + 138297.

It is an arithmetic number, because the mean of its divisors is an integer number (94844960).

Almost surely, 2^1226918372 is an apocalyptic number.

It is an amenable number.

1226918372 is a deficient number, since it is larger than the sum of its proper divisors (1049360668).

1226918372 is a wasteful number, since it uses less digits than its factorization.

1226918372 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 267491 (or 267489 counting only the distinct ones).

The product of its digits is 72576, while the sum is 41.

The square root of 1226918372 is about 35027.3945933751. The cubic root of 1226918372 is about 1070.5457291275.

The spelling of 1226918372 in words is "one billion, two hundred twenty-six million, nine hundred eighteen thousand, three hundred seventy-two".