1121978660 has 48 divisors (see below), whose sum is σ = 2653281792. Its totient is φ = 394828800.

The previous prime is 1121978657. The next prime is 1121978719. The reversal of 1121978660 is 668791211.

It is a super-2 number, since 2×1121978660² = 2517672226990791200, which contains 22 as substring.

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, 75437 + ... + 89076.

It is an arithmetic number, because the mean of its divisors is an integer number (55276704).

Almost surely, 2^1121978660 is an apocalyptic number.

1121978660 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1121978660 is an abundant number, since it is smaller than the sum of its proper divisors (1531303132).

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

1121978660 is a wasteful number, since it uses less digits than its factorization.

1121978660 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 164564 (or 164562 counting only the distinct ones).

The product of its (nonzero) digits is 36288, while the sum is 41.

The square root of 1121978660 is about 33495.9499044287. The cubic root of 1121978660 is about 1039.1100189405.

The spelling of 1121978660 in words is "one billion, one hundred twenty-one million, nine hundred seventy-eight thousand, six hundred sixty".