28999490 has 32 divisors (see below), whose sum is σ = 57743280. Its totient is φ = 10416384.

The previous prime is 28999489. The next prime is 28999499. The reversal of 28999490 is 9499982.

It can be written as a sum of positive squares in 8 ways, for example, as 20802721 + 8196769 = 4561^2 + 2863^2 .

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (28999499) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1796 + ... + 7824.

Almost surely, 2^28999490 is an apocalyptic number.

28999490 is a deficient number, since it is larger than the sum of its proper divisors (28743790).

28999490 is a wasteful number, since it uses less digits than its factorization.

28999490 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6086.

The product of its (nonzero) digits is 419904, while the sum is 50.

The square root of 28999490 is about 5385.1174546151. The cubic root of 28999490 is about 307.2298815447.

The spelling of 28999490 in words is "twenty-eight million, nine hundred ninety-nine thousand, four hundred ninety".