28746490 has 16 divisors (see below), whose sum is σ = 54787752. Its totient is φ = 10822144.

The previous prime is 28746463. The next prime is 28746493. The reversal of 28746490 is 9464782.

It can be written as a sum of positive squares in 4 ways, for example, as 20675209 + 8071281 = 4547^2 + 2841^2 .

It is not an unprimeable number, because it can be changed into a prime (28746493) 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, 84379 + ... + 84718.

Almost surely, 2^28746490 is an apocalyptic number.

28746490 is a deficient number, since it is larger than the sum of its proper divisors (26041262).

28746490 is a wasteful number, since it uses less digits than its factorization.

28746490 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 169121.

The product of its (nonzero) digits is 96768, while the sum is 40.

The square root of 28746490 is about 5361.5753282035. The cubic root of 28746490 is about 306.3338162922. Note that the first 3 decimals are identical.

The spelling of 28746490 in words is "twenty-eight million, seven hundred forty-six thousand, four hundred ninety".