28757707 has 12 divisors (see below), whose sum is σ = 31762528. Its totient is φ = 26017200.

The previous prime is 28757699. The next prime is 28757711. The reversal of 28757707 is 70775782.

It is not a de Polignac number, because 28757707 - 2³ = 28757699 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28757777) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 32353 + ... + 33229.

Almost surely, 2^28757707 is an apocalyptic number.

28757707 is a deficient number, since it is larger than the sum of its proper divisors (3004821).

28757707 is a wasteful number, since it uses less digits than its factorization.

28757707 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1170 (or 1159 counting only the distinct ones).

The product of its (nonzero) digits is 192080, while the sum is 43.

The square root of 28757707 is about 5362.6212806798. The cubic root of 28757707 is about 306.3736553541.

The spelling of 28757707 in words is "twenty-eight million, seven hundred fifty-seven thousand, seven hundred seven".