1161459990 has 24 divisors (see below), whose sum is σ = 3019796208. Its totient is φ = 309722640.

The previous prime is 1161459989. The next prime is 1161459997. The reversal of 1161459990 is 999541611.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1161459997) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 6452466 + ... + 6452645.

It is an arithmetic number, because the mean of its divisors is an integer number (125824842).

Almost surely, 2^1161459990 is an apocalyptic number.

1161459990 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1161459990 is an abundant number, since it is smaller than the sum of its proper divisors (1858336218).

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

1161459990 is a wasteful number, since it uses less digits than its factorization.

1161459990 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12905124 (or 12905121 counting only the distinct ones).

The product of its (nonzero) digits is 87480, while the sum is 45.

The square root of 1161459990 is about 34080.1993832196. The cubic root of 1161459990 is about 1051.1582049628.

The spelling of 1161459990 in words is "one billion, one hundred sixty-one million, four hundred fifty-nine thousand, nine hundred ninety".