1172988 has 24 divisors (see below), whose sum is σ = 3041360. Its totient is φ = 390960.

The previous prime is 1172981. The next prime is 1172993. The reversal of 1172988 is 8892711.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1172981) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5323 + ... + 5538.

2^1172988 is an apocalyptic number.

1172988 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

1172988 is an abundant number, since it is smaller than the sum of its proper divisors (1868372).

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

1172988 is a wasteful number, since it uses less digits than its factorization.

1172988 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10874 (or 10866 counting only the distinct ones).

The product of its digits is 8064, while the sum is 36.

The square root of 1172988 is about 1083.0457054067. The cubic root of 1172988 is about 105.4624500434.

The spelling of 1172988 in words is "one million, one hundred seventy-two thousand, nine hundred eighty-eight".