28957029 has 16 divisors (see below), whose sum is σ = 40400640. Its totient is φ = 18429440.

The previous prime is 28957021. The next prime is 28957031. The reversal of 28957029 is 92075982.

It is a cyclic number.

It is not a de Polignac number, because 28957029 - 2³ = 28957021 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28957021) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3277 + ... + 8285.

It is an arithmetic number, because the mean of its divisors is an integer number (2525040).

Almost surely, 2^28957029 is an apocalyptic number.

It is an amenable number.

28957029 is a deficient number, since it is larger than the sum of its proper divisors (11443611).

28957029 is a wasteful number, since it uses less digits than its factorization.

28957029 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5100.

The product of its (nonzero) digits is 90720, while the sum is 42.

The square root of 28957029 is about 5381.1735708858. The cubic root of 28957029 is about 307.0798598243.

The spelling of 28957029 in words is "twenty-eight million, nine hundred fifty-seven thousand, twenty-nine".