5657728 has 16 divisors (see below), whose sum is σ = 11271510. Its totient is φ = 2828800.

The previous prime is 5657711. The next prime is 5657731. The reversal of 5657728 is 8277565.

It can be written as a sum of positive squares in only one way, i.e., 5419584 + 238144 = 2328^2 + 488^2 .

It is a tau number, because it is divible by the number of its divisors (16).

It is a super-2 number, since 2×5657728² = 64019772243968, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21973 + ... + 22228.

Almost surely, 2^5657728 is an apocalyptic number.

It is an amenable number.

5657728 is a deficient number, since it is larger than the sum of its proper divisors (5613782).

5657728 is an equidigital number, since it uses as much as digits as its factorization.

5657728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44215 (or 44203 counting only the distinct ones).

The product of its digits is 117600, while the sum is 40.

The square root of 5657728 is about 2378.5979063305. The cubic root of 5657728 is about 178.1889169613.

The spelling of 5657728 in words is "five million, six hundred fifty-seven thousand, seven hundred twenty-eight".