28539057 has 8 divisors (see below), whose sum is σ = 38937184. Its totient is φ = 18583488.

The previous prime is 28539053. The next prime is 28539061. The reversal of 28539057 is 75093582.

It is an interprime number because it is at equal distance from previous prime (28539053) and next prime (28539061).

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

It is not a de Polignac number, because 28539057 - 2² = 28539053 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28539053) 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, 110488 + ... + 110745.

It is an arithmetic number, because the mean of its divisors is an integer number (4867148).

Almost surely, 2^28539057 is an apocalyptic number.

It is an amenable number.

28539057 is a deficient number, since it is larger than the sum of its proper divisors (10398127).

28539057 is a wasteful number, since it uses less digits than its factorization.

28539057 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 221279.

The product of its (nonzero) digits is 75600, while the sum is 39.

The square root of 28539057 is about 5342.1958968200. The cubic root of 28539057 is about 305.5952078470.

The spelling of 28539057 in words is "twenty-eight million, five hundred thirty-nine thousand, fifty-seven".