28057929 has 8 divisors (see below), whose sum is σ = 37796640. Its totient is φ = 18512256.

The previous prime is 28057891. The next prime is 28057937. The reversal of 28057929 is 92975082.

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

It is a de Polignac number, because none of the positive numbers 2^k-28057929 is a prime.

It is not an unprimeable number, because it can be changed into a prime (28057979) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 47919 + ... + 48500.

It is an arithmetic number, because the mean of its divisors is an integer number (4724580).

Almost surely, 2^28057929 is an apocalyptic number.

It is an amenable number.

28057929 is a deficient number, since it is larger than the sum of its proper divisors (9738711).

28057929 is an equidigital number, since it uses as much as digits as its factorization.

28057929 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 96519.

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

The square root of 28057929 is about 5296.9735698793. The cubic root of 28057929 is about 303.8681655104.

The spelling of 28057929 in words is "twenty-eight million, fifty-seven thousand, nine hundred twenty-nine".