1187979432 has 32 divisors (see below), whose sum is σ = 3072362400. Its totient is φ = 382337984.

The previous prime is 1187979421. The next prime is 1187979439. The reversal of 1187979432 is 2349797811.

It is a super-2 number, since 2×1187979432² = 2822590261710085248, which contains 22 as substring.

It is a hoax number, since the sum of its digits (51) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (1187979439) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 852738 + ... + 854129.

It is an arithmetic number, because the mean of its divisors is an integer number (96011325).

Almost surely, 2^1187979432 is an apocalyptic number.

1187979432 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1187979432 is an abundant number, since it is smaller than the sum of its proper divisors (1884382968).

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

1187979432 is a wasteful number, since it uses less digits than its factorization.

1187979432 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1706905 (or 1706901 counting only the distinct ones).

The product of its digits is 762048, while the sum is 51.

The square root of 1187979432 is about 34467.0775088344. The cubic root of 1187979432 is about 1059.0983884241.

The spelling of 1187979432 in words is "one billion, one hundred eighty-seven million, nine hundred seventy-nine thousand, four hundred thirty-two".