115001990 has 16 divisors (see below), whose sum is σ = 207321552. Its totient is φ = 45930144.

The previous prime is 115001989. The next prime is 115002011. The reversal of 115001990 is 99100511.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1724 + ... + 15263.

It is an arithmetic number, because the mean of its divisors is an integer number (12957597).

Almost surely, 2^115001990 is an apocalyptic number.

115001990 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

115001990 is a deficient number, since it is larger than the sum of its proper divisors (92319562).

115001990 is a wasteful number, since it uses less digits than its factorization.

115001990 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17671.

The product of its (nonzero) digits is 405, while the sum is 26.

The square root of 115001990 is about 10723.8980785906. The cubic root of 115001990 is about 486.2972180958.

The spelling of 115001990 in words is "one hundred fifteen million, one thousand, nine hundred ninety".