111998438 has 8 divisors (see below), whose sum is σ = 168097032. Its totient is φ = 55966096.

The previous prime is 111998413. The next prime is 111998449. The reversal of 111998438 is 834899111.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×111998438² = 25087300228879688, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12095 + ... + 19242.

It is an arithmetic number, because the mean of its divisors is an integer number (21012129).

Almost surely, 2^111998438 is an apocalyptic number.

111998438 is a deficient number, since it is larger than the sum of its proper divisors (56098594).

111998438 is a wasteful number, since it uses less digits than its factorization.

111998438 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33126.

The product of its digits is 62208, while the sum is 44.

The square root of 111998438 is about 10582.9314464377. The cubic root of 111998438 is about 482.0262119662.

The spelling of 111998438 in words is "one hundred eleven million, nine hundred ninety-eight thousand, four hundred thirty-eight".