1159015990 has 32 divisors (see below), whose sum is σ = 2279708064. Its totient is φ = 420752640.

The previous prime is 1159015981. The next prime is 1159015993. The reversal of 1159015990 is 995109511.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1159015993) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 59332 + ... + 76408.

It is an arithmetic number, because the mean of its divisors is an integer number (71240877).

Almost surely, 2^1159015990 is an apocalyptic number.

1159015990 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1159015990 is a deficient number, since it is larger than the sum of its proper divisors (1120692074).

1159015990 is a wasteful number, since it uses less digits than its factorization.

1159015990 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17712.

The product of its (nonzero) digits is 18225, while the sum is 40.

The square root of 1159015990 is about 34044.3239028182. The cubic root of 1159015990 is about 1050.4203879784.

The spelling of 1159015990 in words is "one billion, one hundred fifty-nine million, fifteen thousand, nine hundred ninety".