28574331 has 8 divisors (see below), whose sum is σ = 40340304. Its totient is φ = 17928960.

The previous prime is 28574321. The next prime is 28574333. The reversal of 28574331 is 13347582.

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

It is not a de Polignac number, because 28574331 - 2⁶ = 28574267 is a prime.

It is a super-2 number, since 2×28574331² = 1632984784195122, which contains 22 as substring.

It is a Smith number, since the sum of its digits (33) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a junction number, because it is equal to n+sod(n) for n = 28574292 and 28574301.

It is not an unprimeable number, because it can be changed into a prime (28574333) 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, 280090 + ... + 280191.

It is an arithmetic number, because the mean of its divisors is an integer number (5042538).

Almost surely, 2^28574331 is an apocalyptic number.

28574331 is a deficient number, since it is larger than the sum of its proper divisors (11765973).

28574331 is a wasteful number, since it uses less digits than its factorization.

28574331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 560301.

The product of its digits is 20160, while the sum is 33.

The square root of 28574331 is about 5345.4963286864. The cubic root of 28574331 is about 305.7210602565.

The spelling of 28574331 in words is "twenty-eight million, five hundred seventy-four thousand, three hundred thirty-one".