1149999990 has 32 divisors (see below), whose sum is σ = 2788460640. Its totient is φ = 303504384.

The previous prime is 1149999973. The next prime is 1150000009. The reversal of 1149999990 is 999999411.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 194685 + ... + 200504.

It is an arithmetic number, because the mean of its divisors is an integer number (87139395).

Almost surely, 2^1149999990 is an apocalyptic number.

1149999990 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1149999990 is an abundant number, since it is smaller than the sum of its proper divisors (1638460650).

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

1149999990 is a wasteful number, since it uses less digits than its factorization.

1149999990 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 395296.

The product of its (nonzero) digits is 2125764, while the sum is 60.

The square root of 1149999990 is about 33911.6497681844. The cubic root of 1149999990 is about 1047.6895501349.

The spelling of 1149999990 in words is "one billion, one hundred forty-nine million, nine hundred ninety-nine thousand, nine hundred ninety".