28753490 has 8 divisors (see below), whose sum is σ = 51756300. Its totient is φ = 11501392.

The previous prime is 28753489. The next prime is 28753493. The reversal of 28753490 is 9435782.

It can be written as a sum of positive squares in 2 ways, for example, as 27678121 + 1075369 = 5261^2 + 1037^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (28753493) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1437665 + ... + 1437684.

Almost surely, 2^28753490 is an apocalyptic number.

28753490 is a deficient number, since it is larger than the sum of its proper divisors (23002810).

28753490 is a wasteful number, since it uses less digits than its factorization.

28753490 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2875356.

The product of its (nonzero) digits is 60480, while the sum is 38.

The square root of 28753490 is about 5362.2280816840. The cubic root of 28753490 is about 306.3586791849.

The spelling of 28753490 in words is "twenty-eight million, seven hundred fifty-three thousand, four hundred ninety".