1172993872 has 20 divisors (see below), whose sum is σ = 2345988736. Its totient is φ = 567577440.

The previous prime is 1172993851. The next prime is 1172993873. The reversal of 1172993872 is 2783992711.

1172993872 is an admirable number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1172993873) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1181958 + ... + 1182949.

Almost surely, 2^1172993872 is an apocalyptic number.

It is an amenable number.

1172993872 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

1172993872 is a wasteful number, since it uses less digits than its factorization.

1172993872 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2364946 (or 2364940 counting only the distinct ones).

The product of its digits is 381024, while the sum is 49.

The square root of 1172993872 is about 34248.9981167333. The cubic root of 1172993872 is about 1054.6262602549.

The spelling of 1172993872 in words is "one billion, one hundred seventy-two million, nine hundred ninety-three thousand, eight hundred seventy-two".