1155108690 has 48 divisors (see below), whose sum is σ = 3179950488. Its totient is φ = 289909248.

The previous prime is 1155108679. The next prime is 1155108697. The reversal of 1155108690 is 968015511.

1155108690 is a `hidden beast` number, since 11 + 551 + 0 + 8 + 6 + 90 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 1074593961 + 80514729 = 32781^2 + 8973^2 .

It is a super-2 number, since 2×1155108690² = 2668552171427032200, which contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1155108697) 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, 375957 + ... + 379016.

Almost surely, 2^1155108690 is an apocalyptic number.

1155108690 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1155108690 is an abundant number, since it is smaller than the sum of its proper divisors (2024841798).

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

1155108690 is a wasteful number, since it uses less digits than its factorization.

1155108690 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 755003 (or 755000 counting only the distinct ones).

The product of its (nonzero) digits is 10800, while the sum is 36.

The square root of 1155108690 is about 33986.8899724585. The cubic root of 1155108690 is about 1049.2386589795.

The spelling of 1155108690 in words is "one billion, one hundred fifty-five million, one hundred eight thousand, six hundred ninety".