1522728 has 24 divisors (see below), whose sum is σ = 4124250. Its totient is φ = 507552.

The previous prime is 1522727. The next prime is 1522733. The reversal of 1522728 is 8272251.

1522728 is nontrivially palindromic in base 11.

It can be written as a sum of positive squares in only one way, i.e., 1483524 + 39204 = 1218^2 + 198^2 .

It is a tau number, because it is divible by the number of its divisors (24).

It is not an unprimeable number, because it can be changed into a prime (1522727) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 10503 + ... + 10646.

2^1522728 is an apocalyptic number.

1522728 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

1522728 is an abundant number, since it is smaller than the sum of its proper divisors (2601522).

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

1522728 is a wasteful number, since it uses less digits than its factorization.

1522728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21161 (or 21154 counting only the distinct ones).

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

The square root of 1522728 is about 1233.9886547290. The cubic root of 1522728 is about 115.0466855188.

Adding to 1522728 its reverse (8272251), we get a palindrome (9794979).

It can be divided in two parts, 1 and 522728, that added together give a square (522729 = 723²).

The spelling of 1522728 in words is "one million, five hundred twenty-two thousand, seven hundred twenty-eight".