111878398 has 4 divisors (see below), whose sum is σ = 167817600. Its totient is φ = 55939198.

The previous prime is 111878383. The next prime is 111878399. The reversal of 111878398 is 893878111.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 893878111 = 7 ⋅127696873.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111878399) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27969598 + ... + 27969601.

It is an arithmetic number, because the mean of its divisors is an integer number (41954400).

Almost surely, 2^111878398 is an apocalyptic number.

111878398 is a deficient number, since it is larger than the sum of its proper divisors (55939202).

111878398 is an equidigital number, since it uses as much as digits as its factorization.

111878398 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55939201.

The product of its digits is 96768, while the sum is 46.

The square root of 111878398 is about 10577.2585295056. The cubic root of 111878398 is about 481.8539383995.

The spelling of 111878398 in words is "one hundred eleven million, eight hundred seventy-eight thousand, three hundred ninety-eight".