1165494990 has 48 divisors (see below), whose sum is σ = 3074604624. Its totient is φ = 282543360.

The previous prime is 1165494929. The next prime is 1165494991. The reversal of 1165494990 is 994945611.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1165494991) 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, 156907 + ... + 164166.

It is an arithmetic number, because the mean of its divisors is an integer number (64054263).

Almost surely, 2^1165494990 is an apocalyptic number.

1165494990 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1165494990 is an abundant number, since it is smaller than the sum of its proper divisors (1909109634).

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

1165494990 is a wasteful number, since it uses less digits than its factorization.

1165494990 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 321105 (or 321094 counting only the distinct ones).

The product of its (nonzero) digits is 349920, while the sum is 48.

The square root of 1165494990 is about 34139.3466545568. The cubic root of 1165494990 is about 1052.3740657977.

The spelling of 1165494990 in words is "one billion, one hundred sixty-five million, four hundred ninety-four thousand, nine hundred ninety".