28930357 has 4 divisors (see below), whose sum is σ = 29603200. Its totient is φ = 28257516.

The previous prime is 28930351. The next prime is 28930361. The reversal of 28930357 is 75303982.

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 a cyclic number.

It is not a de Polignac number, because 28930357 - 2⁷ = 28930229 is a prime.

It is a super-2 number, since 2×28930357² = 1673931112294898, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28930351) 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, 336357 + ... + 336442.

It is an arithmetic number, because the mean of its divisors is an integer number (7400800).

Almost surely, 2^28930357 is an apocalyptic number.

It is an amenable number.

28930357 is a deficient number, since it is larger than the sum of its proper divisors (672843).

28930357 is an equidigital number, since it uses as much as digits as its factorization.

28930357 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 672842.

The product of its (nonzero) digits is 45360, while the sum is 37.

The square root of 28930357 is about 5378.6947301367. The cubic root of 28930357 is about 306.9855482380.

The spelling of 28930357 in words is "twenty-eight million, nine hundred thirty thousand, three hundred fifty-seven".