111228390 has 192 divisors, whose sum is σ = 369847296. Its totient is φ = 23421312.

The previous prime is 111228389. The next prime is 111228431. The reversal of 111228390 is 93822111.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 220879 + ... + 221381.

It is an arithmetic number, because the mean of its divisors is an integer number (1926288).

Almost surely, 2^111228390 is an apocalyptic number.

111228390 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 111228390, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (184923648).

111228390 is an abundant number, since it is smaller than the sum of its proper divisors (258618906).

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

111228390 is a wasteful number, since it uses less digits than its factorization.

111228390 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 545 (or 533 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 27.

The square root of 111228390 is about 10546.4870928665. The cubic root of 111228390 is about 480.9189427196.

The spelling of 111228390 in words is "one hundred eleven million, two hundred twenty-eight thousand, three hundred ninety".