1172988864 has 140 divisors (see below), whose sum is σ = 3660419400. Its totient is φ = 370386432.

The previous prime is 1172988847. The next prime is 1172988889. The reversal of 1172988864 is 4688892711.

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 Harshad number since it is a multiple of its sum of digits (54).

It is a self number, because there is not a number n which added to its sum of digits gives 1172988864.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 92542 + ... + 104450.

Almost surely, 2^1172988864 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1172988864, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1830209700).

1172988864 is an abundant number, since it is smaller than the sum of its proper divisors (2487430536).

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

1172988864 is a wasteful number, since it uses less digits than its factorization.

1172988864 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11952 (or 11933 counting only the distinct ones).

The product of its digits is 1548288, while the sum is 54.

The square root of 1172988864 is about 34248.9250050275. The cubic root of 1172988864 is about 1054.6247593730.

The spelling of 1172988864 in words is "one billion, one hundred seventy-two million, nine hundred eighty-eight thousand, eight hundred sixty-four".