2957728 has 24 divisors (see below), whose sum is σ = 6166692. Its totient is φ = 1391616.

The previous prime is 2957687. The next prime is 2957753. The reversal of 2957728 is 8277592.

It can be written as a sum of positive squares in 2 ways, for example, as 2862864 + 94864 = 1692^2 + 308^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2175 + ... + 3262.

2^2957728 is an apocalyptic number.

2957728 is the 1088-th heptagonal number.

It is an amenable number.

2957728 is an abundant number, since it is smaller than the sum of its proper divisors (3208964).

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

2957728 is a wasteful number, since it uses less digits than its factorization.

2957728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5464 (or 5456 counting only the distinct ones).

The product of its digits is 70560, while the sum is 40.

The square root of 2957728 is about 1719.8046400682. The cubic root of 2957728 is about 143.5443415763.

It can be divided in two parts, 2 and 957728, that multiplied together give a square (1915456 = 1384²).

The spelling of 2957728 in words is "two million, nine hundred fifty-seven thousand, seven hundred twenty-eight".