28690757 has 8 divisors (see below), whose sum is σ = 29136576. Its totient is φ = 28248192.

The previous prime is 28690751. The next prime is 28690759. The reversal of 28690757 is 75709682.

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

It is a cyclic number.

It is not a de Polignac number, because 28690757 - 2¹⁰ = 28689733 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28690751) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 21368 + ... + 22670.

It is an arithmetic number, because the mean of its divisors is an integer number (3642072).

Almost surely, 2^28690757 is an apocalyptic number.

It is an amenable number.

28690757 is a deficient number, since it is larger than the sum of its proper divisors (445819).

28690757 is a wasteful number, since it uses less digits than its factorization.

28690757 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1627.

The product of its (nonzero) digits is 211680, while the sum is 44.

The square root of 28690757 is about 5356.3753602600. The cubic root of 28690757 is about 306.1357173476.

The spelling of 28690757 in words is "twenty-eight million, six hundred ninety thousand, seven hundred fifty-seven".