1189079980 has 24 divisors (see below), whose sum is σ = 2724074640. Its totient is φ = 432392640.

The previous prime is 1189079971. The next prime is 1189080007. The reversal of 1189079980 is 899709811.

It is a super-2 number, since 2×1189079980² = 2827822397673600800, which contains 22 as substring.

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, 2702235 + ... + 2702674.

It is an arithmetic number, because the mean of its divisors is an integer number (113503110).

Almost surely, 2^1189079980 is an apocalyptic number.

1189079980 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1189079980 is an abundant number, since it is smaller than the sum of its proper divisors (1534994660).

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

1189079980 is a wasteful number, since it uses less digits than its factorization.

1189079980 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5404929 (or 5404927 counting only the distinct ones).

The product of its (nonzero) digits is 326592, while the sum is 52.

The square root of 1189079980 is about 34483.0390192048. The cubic root of 1189079980 is about 1059.4253382101.

The spelling of 1189079980 in words is "one billion, one hundred eighty-nine million, seventy-nine thousand, nine hundred eighty".