1187978814 has 48 divisors (see below), whose sum is σ = 2810296944. Its totient is φ = 359692800.

The previous prime is 1187978801. The next prime is 1187978833. The reversal of 1187978814 is 4188797811.

It is a super-2 number, since 2×1187978814² = 2822587325025693192, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

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, 389134 + ... + 392174.

It is an arithmetic number, because the mean of its divisors is an integer number (58547853).

Almost surely, 2^1187978814 is an apocalyptic number.

1187978814 is an abundant number, since it is smaller than the sum of its proper divisors (1622318130).

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

1187978814 is a wasteful number, since it uses less digits than its factorization.

1187978814 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5033 (or 5030 counting only the distinct ones).

The product of its digits is 903168, while the sum is 54.

The square root of 1187978814 is about 34467.0685437564. The cubic root of 1187978814 is about 1059.0982047725.

The spelling of 1187978814 in words is "one billion, one hundred eighty-seven million, nine hundred seventy-eight thousand, eight hundred fourteen".