15648228 has 72 divisors (see below), whose sum is σ = 43479072. Its totient is φ = 4904064.

The previous prime is 15648209. The next prime is 15648253. The reversal of 15648228 is 82284651.

15648228 is a `hidden beast` number, since 1 + 5 + 648 + 2 + 2 + 8 = 666.

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 = 15648192 and 15648201.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 16051 + ... + 16997.

It is an arithmetic number, because the mean of its divisors is an integer number (603876).

Almost surely, 2^15648228 is an apocalyptic number.

15648228 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 15648228, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (21739536).

15648228 is an abundant number, since it is smaller than the sum of its proper divisors (27830844).

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

15648228 is a wasteful number, since it uses less digits than its factorization.

15648228 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 983 (or 969 counting only the distinct ones).

The product of its digits is 30720, while the sum is 36.

The square root of 15648228 is about 3955.7841194888. The cubic root of 15648228 is about 250.1238213297.

It can be divided in two parts, 15648 and 228, that added together give a square (15876 = 126²).

The spelling of 15648228 in words is "fifteen million, six hundred forty-eight thousand, two hundred twenty-eight".