118728427 has 4 divisors (see below), whose sum is σ = 120968640. Its totient is φ = 116488216.

The previous prime is 118728413. The next prime is 118728437. The reversal of 118728427 is 724827811.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 118728427 - 2¹¹ = 118726379 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 118728427.

It is not an unprimeable number, because it can be changed into a prime (118728437) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1120027 + ... + 1120132.

It is an arithmetic number, because the mean of its divisors is an integer number (30242160).

Almost surely, 2^118728427 is an apocalyptic number.

118728427 is a deficient number, since it is larger than the sum of its proper divisors (2240213).

118728427 is an equidigital number, since it uses as much as digits as its factorization.

118728427 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2240212.

The product of its digits is 50176, while the sum is 40.

The square root of 118728427 is about 10896.2574767670. The cubic root of 118728427 is about 491.4940198323.

The spelling of 118728427 in words is "one hundred eighteen million, seven hundred twenty-eight thousand, four hundred twenty-seven".