28670957 has 8 divisors (see below), whose sum is σ = 32826816. Its totient is φ = 24530112.

The previous prime is 28670953. The next prime is 28670989. The reversal of 28670957 is 75907682.

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 28670957 - 2² = 28670953 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 (28670951) 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, 698 + ... + 7604.

It is an arithmetic number, because the mean of its divisors is an integer number (4103352).

Almost surely, 2^28670957 is an apocalyptic number.

It is an amenable number.

28670957 is a deficient number, since it is larger than the sum of its proper divisors (4155859).

28670957 is an equidigital number, since it uses as much as digits as its factorization.

28670957 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7507.

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

The square root of 28670957 is about 5354.5267764761. The cubic root of 28670957 is about 306.0652779128.

The spelling of 28670957 in words is "twenty-eight million, six hundred seventy thousand, nine hundred fifty-seven".