28449770 has 16 divisors (see below), whose sum is σ = 51270408. Its totient is φ = 11366400.

The previous prime is 28449769. The next prime is 28449787. The reversal of 28449770 is 7794482.

It can be written as a sum of positive squares in 4 ways, for example, as 28206721 + 243049 = 5311^2 + 493^2 .

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, 15122 + ... + 16898.

Almost surely, 2^28449770 is an apocalyptic number.

28449770 is a deficient number, since it is larger than the sum of its proper divisors (22820638).

28449770 is a wasteful number, since it uses less digits than its factorization.

28449770 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3385.

The product of its (nonzero) digits is 112896, while the sum is 41.

The square root of 28449770 is about 5333.8325807997. The cubic root of 28449770 is about 305.2761809065.

The spelling of 28449770 in words is "twenty-eight million, four hundred forty-nine thousand, seven hundred seventy".