1572228 has 72 divisors (see below), whose sum is σ = 4822272. Its totient is φ = 421632.

The previous prime is 1572217. The next prime is 1572239. The reversal of 1572228 is 8222751.

It is an interprime number because it is at equal distance from previous prime (1572217) and next prime (1572239).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 4101 + ... + 4467.

It is an arithmetic number, because the mean of its divisors is an integer number (66976).

2^1572228 is an apocalyptic number.

1572228 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 1572228, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2411136).

1572228 is an abundant number, since it is smaller than the sum of its proper divisors (3250044).

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

1572228 is a wasteful number, since it uses less digits than its factorization.

1572228 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 401 (or 396 counting only the distinct ones).

The product of its digits is 2240, while the sum is 27.

The square root of 1572228 is about 1253.8851622059. The cubic root of 1572228 is about 116.2800407969.

Adding to 1572228 its reverse (8222751), we get a palindrome (9794979).

The spelling of 1572228 in words is "one million, five hundred seventy-two thousand, two hundred twenty-eight".