2531728 has 10 divisors (see below), whose sum is σ = 4905254. Its totient is φ = 1265856.

The previous prime is 2531717. The next prime is 2531741. The reversal of 2531728 is 8271352.

It can be written as a sum of positive squares in only one way, i.e., 2396304 + 135424 = 1548^2 + 368^2 .

It is a junction number, because it is equal to n+sod(n) for n = 2531696 and 2531705.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 79101 + ... + 79132.

2^2531728 is an apocalyptic number.

It is an amenable number.

2531728 is a deficient number, since it is larger than the sum of its proper divisors (2373526).

2531728 is a wasteful number, since it uses less digits than its factorization.

2531728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 158241 (or 158235 counting only the distinct ones).

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

The square root of 2531728 is about 1591.1404714858. The cubic root of 2531728 is about 136.2926225264.

The spelling of 2531728 in words is "two million, five hundred thirty-one thousand, seven hundred twenty-eight".