28049554 has 16 divisors (see below), whose sum is σ = 46874520. Its totient is φ = 12499200.

The previous prime is 28049551. The next prime is 28049563. The reversal of 28049554 is 45594082.

It can be written as a sum of positive squares in 4 ways, for example, as 12089529 + 15960025 = 3477^2 + 3995^2 .

It is not an unprimeable number, because it can be changed into a prime (28049551) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 17847 + ... + 19354.

Almost surely, 2^28049554 is an apocalyptic number.

28049554 is a deficient number, since it is larger than the sum of its proper divisors (18824966).

28049554 is a wasteful number, since it uses less digits than its factorization.

28049554 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37245.

The product of its (nonzero) digits is 57600, while the sum is 37.

The square root of 28049554 is about 5296.1829651174. The cubic root of 28049554 is about 303.8379286727.

The spelling of 28049554 in words is "twenty-eight million, forty-nine thousand, five hundred fifty-four".