118728615 has 16 divisors (see below), whose sum is σ = 191812608. Its totient is φ = 62706336.

The previous prime is 118728613. The next prime is 118728619. The reversal of 118728615 is 516827811.

It is not a de Polignac number, because 118728615 - 2¹ = 118728613 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (118728611) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 36879 + ... + 39968.

It is an arithmetic number, because the mean of its divisors is an integer number (11988288).

Almost surely, 2^118728615 is an apocalyptic number.

118728615 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

118728615 is a deficient number, since it is larger than the sum of its proper divisors (73083993).

118728615 is a wasteful number, since it uses less digits than its factorization.

118728615 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 76958.

The product of its digits is 26880, while the sum is 39.

The square root of 118728615 is about 10896.2661035788. The cubic root of 118728615 is about 491.4942792501.

The spelling of 118728615 in words is "one hundred eighteen million, seven hundred twenty-eight thousand, six hundred fifteen".