111401992 has 64 divisors (see below), whose sum is σ = 238392000. Its totient is φ = 48432384.

The previous prime is 111401989. The next prime is 111401993. The reversal of 111401992 is 299104111.

It is a self number, because there is not a number n which added to its sum of digits gives 111401992.

It is not an unprimeable number, because it can be changed into a prime (111401993) 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, 129259 + ... + 130117.

It is an arithmetic number, because the mean of its divisors is an integer number (3724875).

Almost surely, 2^111401992 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 111401992, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (119196000).

111401992 is an abundant number, since it is smaller than the sum of its proper divisors (126990008).

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

111401992 is a wasteful number, since it uses less digits than its factorization.

111401992 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 950 (or 946 counting only the distinct ones).

The product of its (nonzero) digits is 648, while the sum is 28.

The square root of 111401992 is about 10554.7142074051. The cubic root of 111401992 is about 481.1690140441.

It can be divided in two parts, 1114019 and 92, that added together give a palindrome (1114111).

The spelling of 111401992 in words is "one hundred eleven million, four hundred one thousand, nine hundred ninety-two".