1537228 has 72 divisors (see below), whose sum is σ = 3677184. Its totient is φ = 554400.

The previous prime is 1537223. The next prime is 1537241. The reversal of 1537228 is 8227351.

It is a Harshad number since it is a multiple of its sum of digits (28).

It is a junction number, because it is equal to n+sod(n) for n = 1537196 and 1537205.

It is not an unprimeable number, because it can be changed into a prime (1537223) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 49573 + ... + 49603.

It is an arithmetic number, because the mean of its divisors is an integer number (51072).

2^1537228 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 1537228, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1838592).

1537228 is an abundant number, since it is smaller than the sum of its proper divisors (2139956).

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

1537228 is a wasteful number, since it uses less digits than its factorization.

1537228 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 83 (or 74 counting only the distinct ones).

The product of its digits is 3360, while the sum is 28.

The square root of 1537228 is about 1239.8499909263. The cubic root of 1537228 is about 115.4107053937.

It can be divided in two parts, 15372 and 28, that added together give a triangular number (15400 = T₁₇₅).

The spelling of 1537228 in words is "one million, five hundred thirty-seven thousand, two hundred twenty-eight".