1156129990 has 16 divisors (see below), whose sum is σ = 2094818400. Its totient is φ = 459388800.

The previous prime is 1156129967. The next prime is 1156130021. The reversal of 1156129990 is 999216511.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 381315 + ... + 384334.

It is an arithmetic number, because the mean of its divisors is an integer number (130926150).

Almost surely, 2^1156129990 is an apocalyptic number.

1156129990 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1156129990 is a deficient number, since it is larger than the sum of its proper divisors (938688410).

1156129990 is a wasteful number, since it uses less digits than its factorization.

1156129990 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 765807.

The product of its (nonzero) digits is 43740, while the sum is 43.

The square root of 1156129990 is about 34001.9115639106. The cubic root of 1156129990 is about 1049.5477992330.

The spelling of 1156129990 in words is "one billion, one hundred fifty-six million, one hundred twenty-nine thousand, nine hundred ninety".