1172080690 has 64 divisors (see below), whose sum is σ = 2447200512. Its totient is φ = 399942400.

The previous prime is 1172080687. The next prime is 1172080699. The reversal of 1172080690 is 960802711.

It is a happy number.

It is a super-2 number, since 2×1172080690² = 2747546287741752200, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1172080699) 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 31 ways as a sum of consecutive naturals, for example, 129720 + ... + 138460.

It is an arithmetic number, because the mean of its divisors is an integer number (38237508).

Almost surely, 2^1172080690 is an apocalyptic number.

1172080690 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1172080690 is an abundant number, since it is smaller than the sum of its proper divisors (1275119822).

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

1172080690 is a wasteful number, since it uses less digits than its factorization.

1172080690 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8835.

The product of its (nonzero) digits is 6048, while the sum is 34.

The square root of 1172080690 is about 34235.6640069971. The cubic root of 1172080690 is about 1054.3525118106.

The spelling of 1172080690 in words is "one billion, one hundred seventy-two million, eighty thousand, six hundred ninety".