14991228 has 144 divisors (see below), whose sum is σ = 47523840. Its totient is φ = 3888000.

The previous prime is 14991227. The next prime is 14991233. The reversal of 14991228 is 82219941.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 14991192 and 14991201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (14991227) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 148378 + ... + 148478.

Almost surely, 2^14991228 is an apocalyptic number.

14991228 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 14991228, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (23761920).

14991228 is an abundant number, since it is smaller than the sum of its proper divisors (32532612).

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

14991228 is a wasteful number, since it uses less digits than its factorization.

14991228 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 168 (or 163 counting only the distinct ones).

The product of its digits is 10368, while the sum is 36.

The square root of 14991228 is about 3871.8507202629. The cubic root of 14991228 is about 246.5731233646.

The spelling of 14991228 in words is "fourteen million, nine hundred ninety-one thousand, two hundred twenty-eight".