2728449490 has 32 divisors (see below), whose sum is σ = 5297258736. Its totient is φ = 1005853440.

The previous prime is 2728449473. The next prime is 2728449517. The reversal of 2728449490 is 949448272.

It is a happy number.

It can be written as a sum of positive squares in 8 ways, for example, as 1172857009 + 1555592481 = 34247^2 + 39441^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 68820 + ... + 100960.

Almost surely, 2^2728449490 is an apocalyptic number.

2728449490 is a deficient number, since it is larger than the sum of its proper divisors (2568809246).

2728449490 is a wasteful number, since it uses less digits than its factorization.

2728449490 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32814.

The product of its (nonzero) digits is 1161216, while the sum is 49.

The square root of 2728449490 is about 52234.5622169843. The cubic root of 2728449490 is about 1397.3503438360.

The spelling of 2728449490 in words is "two billion, seven hundred twenty-eight million, four hundred forty-nine thousand, four hundred ninety".