2723428 has 6 divisors (see below), whose sum is σ = 4766006. Its totient is φ = 1361712.

The previous prime is 2723401. The next prime is 2723431. The reversal of 2723428 is 8243272.

It can be written as a sum of positive squares in only one way, i.e., 1517824 + 1205604 = 1232^2 + 1098^2 .

It is a junction number, because it is equal to n+sod(n) for n = 2723396 and 2723405.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 340425 + ... + 340432.

2^2723428 is an apocalyptic number.

It is an amenable number.

2723428 is a deficient number, since it is larger than the sum of its proper divisors (2042578).

2723428 is a wasteful number, since it uses less digits than its factorization.

2723428 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 680861 (or 680859 counting only the distinct ones).

The product of its digits is 5376, while the sum is 28.

The square root of 2723428 is about 1650.2811881616. The cubic root of 2723428 is about 139.6492580747.

The spelling of 2723428 in words is "two million, seven hundred twenty-three thousand, four hundred twenty-eight".