28757506 has 8 divisors (see below), whose sum is σ = 45673740. Its totient is φ = 13532928.

The previous prime is 28757471. The next prime is 28757527. The reversal of 28757506 is 60575782.

It can be written as a sum of positive squares in 2 ways, for example, as 27931225 + 826281 = 5285^2 + 909^2 .

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

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 422871 + ... + 422938.

Almost surely, 2^28757506 is an apocalyptic number.

28757506 is a deficient number, since it is larger than the sum of its proper divisors (16916234).

28757506 is a wasteful number, since it uses less digits than its factorization.

28757506 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 845828.

The product of its (nonzero) digits is 117600, while the sum is 40.

The square root of 28757506 is about 5362.6025398122. The cubic root of 28757506 is about 306.3729415600.

The spelling of 28757506 in words is "twenty-eight million, seven hundred fifty-seven thousand, five hundred six".