28327957 has 4 divisors (see below), whose sum is σ = 32374816. Its totient is φ = 24281100.

The previous prime is 28327951. The next prime is 28327963. The reversal of 28327957 is 75972382.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is an interprime number because it is at equal distance from previous prime (28327951) and next prime (28327963).

It is a cyclic number.

It is not a de Polignac number, because 28327957 - 2²³ = 19939349 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 (28327951) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2023419 + ... + 2023432.

It is an arithmetic number, because the mean of its divisors is an integer number (8093704).

Almost surely, 2^28327957 is an apocalyptic number.

It is an amenable number.

28327957 is a deficient number, since it is larger than the sum of its proper divisors (4046859).

28327957 is an equidigital number, since it uses as much as digits as its factorization.

28327957 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4046858.

The product of its digits is 211680, while the sum is 43.

The square root of 28327957 is about 5322.4014316848. The cubic root of 28327957 is about 304.8398585996.

The spelling of 28327957 in words is "twenty-eight million, three hundred twenty-seven thousand, nine hundred fifty-seven".