1213340944 has 20 divisors (see below), whose sum is σ = 2351529180. Its totient is φ = 606494720.

The previous prime is 1213340929. The next prime is 1213340951. The reversal of 1213340944 is 4490433121.

It can be written as a sum of positive squares in 2 ways, for example, as 788486400 + 424854544 = 28080^2 + 20612^2 .

It is a super-2 number, since 2×1213340944² = 2944392492773622272, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 59784 + ... + 77464.

It is an arithmetic number, because the mean of its divisors is an integer number (117576459).

Almost surely, 2^1213340944 is an apocalyptic number.

It is an amenable number.

1213340944 is a deficient number, since it is larger than the sum of its proper divisors (1138188236).

1213340944 is a wasteful number, since it uses less digits than its factorization.

1213340944 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21978 (or 21972 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 31.

The square root of 1213340944 is about 34833.0438520667. The cubic root of 1213340944 is about 1066.5820840917.

The spelling of 1213340944 in words is "one billion, two hundred thirteen million, three hundred forty thousand, nine hundred forty-four".