11915898 has 16 divisors (see below), whose sum is σ = 23913120. Its totient is φ = 3958416.

The previous prime is 11915881. The next prime is 11915899. The reversal of 11915898 is 89851911.

It is not an unprimeable number, because it can be changed into a prime (11915899) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1393 + ... + 5076.

It is an arithmetic number, because the mean of its divisors is an integer number (1494570).

Almost surely, 2^11915898 is an apocalyptic number.

11915898 is an abundant number, since it is smaller than the sum of its proper divisors (11997222).

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

11915898 is a wasteful number, since it uses less digits than its factorization.

11915898 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6781.

The product of its digits is 25920, while the sum is 42.

The square root of 11915898 is about 3451.9411930101. The cubic root of 11915898 is about 228.4067454759.

The spelling of 11915898 in words is "eleven million, nine hundred fifteen thousand, eight hundred ninety-eight".