1187979948 has 72 divisors (see below), whose sum is σ = 3105608688. Its totient is φ = 382681728.

The previous prime is 1187979929. The next prime is 1187979953. The reversal of 1187979948 is 8499797811.

It is a happy number.

It is a super-2 number, since 2×1187979948² = 2822592713700165408, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 123190 + ... + 132482.

It is an arithmetic number, because the mean of its divisors is an integer number (43133454).

Almost surely, 2^1187979948 is an apocalyptic number.

1187979948 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1187979948, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1552804344).

1187979948 is an abundant number, since it is smaller than the sum of its proper divisors (1917628740).

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

1187979948 is a wasteful number, since it uses less digits than its factorization.

1187979948 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9423 (or 9418 counting only the distinct ones).

The product of its digits is 9144576, while the sum is 63.

The square root of 1187979948 is about 34467.0849942376. The cubic root of 1187979948 is about 1059.0985417642.

The spelling of 1187979948 in words is "one billion, one hundred eighty-seven million, nine hundred seventy-nine thousand, nine hundred forty-eight".