118129690 has 36 divisors (see below), whose sum is σ = 247853898. Its totient is φ = 40419120.

The previous prime is 118129657. The next prime is 118129691. The reversal of 118129690 is 96921811.

It can be written as a sum of positive squares in only one way, i.e., 106316721 + 11812969 = 10311^2 + 3437^2 .

It is a super-2 number, since 2×118129690² = 27909247318992200, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (118129691) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 240345 + ... + 240835.

Almost surely, 2^118129690 is an apocalyptic number.

118129690 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

118129690 is an abundant number, since it is smaller than the sum of its proper divisors (129724208).

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

118129690 is an frugal number, since it uses more digits than its factorization.

118129690 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1003 (or 505 counting only the distinct ones).

The product of its (nonzero) digits is 7776, while the sum is 37.

The square root of 118129690 is about 10868.7483179987. The cubic root of 118129690 is about 490.6664401147. Note that the first 3 decimals are identical.

The spelling of 118129690 in words is "one hundred eighteen million, one hundred twenty-nine thousand, six hundred ninety".