118661390 has 16 divisors (see below), whose sum is σ = 217211760. Its totient is φ = 46659840.

The previous prime is 118661383. The next prime is 118661399. The reversal of 118661390 is 93166811.

It is a self number, because there is not a number n which added to its sum of digits gives 118661390.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (118661399) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 99971 + ... + 101150.

It is an arithmetic number, because the mean of its divisors is an integer number (13575735).

Almost surely, 2^118661390 is an apocalyptic number.

118661390 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

118661390 is a deficient number, since it is larger than the sum of its proper divisors (98550370).

118661390 is a wasteful number, since it uses less digits than its factorization.

118661390 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 201187.

The product of its (nonzero) digits is 7776, while the sum is 35.

The square root of 118661390 is about 10893.1808944862. The cubic root of 118661390 is about 491.4014991992.

The spelling of 118661390 in words is "one hundred eighteen million, six hundred sixty-one thousand, three hundred ninety".