2728390 has 16 divisors (see below), whose sum is σ = 5612832. Its totient is φ = 935424.

The previous prime is 2728373. The next prime is 2728409. The reversal of 2728390 is 938272.

It is a super-2 number, since 2×2728390² = 14888223984200, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 19419 + ... + 19558.

It is an arithmetic number, because the mean of its divisors is an integer number (350802).

2^2728390 is an apocalyptic number.

2728390 is an abundant number, since it is smaller than the sum of its proper divisors (2884442).

2728390 is a wasteful number, since it uses less digits than its factorization.

2728390 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38991.

The product of its (nonzero) digits is 6048, while the sum is 31.

The square root of 2728390 is about 1651.7838841689. The cubic root of 2728390 is about 139.7340188010.

The spelling of 2728390 in words is "two million, seven hundred twenty-eight thousand, three hundred ninety".