1187864874 has 48 divisors (see below), whose sum is σ = 3013133760. Its totient is φ = 331110720.

The previous prime is 1187864869. The next prime is 1187864879. The reversal of 1187864874 is 4784687811.

1187864874 is a `hidden beast` number, since 1 + 1 + 87 + 86 + 487 + 4 = 666.

It is an interprime number because it is at equal distance from previous prime (1187864869) and next prime (1187864879).

It is a super-2 number, since 2×1187864874² = 2822045917766071752, which contains 22 as substring.

It is a Smith number, since the sum of its digits (54) coincides with the sum of the digits of its prime factors.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 1187864874.

It is not an unprimeable number, because it can be changed into a prime (1187864879) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 109804 + ... + 120135.

It is an arithmetic number, because the mean of its divisors is an integer number (62773620).

Almost surely, 2^1187864874 is an apocalyptic number.

1187864874 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

1187864874 is an abundant number, since it is smaller than the sum of its proper divisors (1825268886).

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

1187864874 is a wasteful number, since it uses less digits than its factorization.

1187864874 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 229995 (or 229992 counting only the distinct ones).

The product of its digits is 2408448, while the sum is 54.

The square root of 1187864874 is about 34465.4156220406. The cubic root of 1187864874 is about 1059.0643440375.

The spelling of 1187864874 in words is "one billion, one hundred eighty-seven million, eight hundred sixty-four thousand, eight hundred seventy-four".