28539747 has 12 divisors (see below), whose sum is σ = 42554304. Its totient is φ = 18412560.

The previous prime is 28539743. The next prime is 28539751. The reversal of 28539747 is 74793582.

It is an interprime number because it is at equal distance from previous prime (28539743) and next prime (28539751).

It is not a de Polignac number, because 28539747 - 2² = 28539743 is a prime.

It is not an unprimeable number, because it can be changed into a prime (28539743) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 50868 + ... + 51425.

It is an arithmetic number, because the mean of its divisors is an integer number (3546192).

Almost surely, 2^28539747 is an apocalyptic number.

28539747 is a deficient number, since it is larger than the sum of its proper divisors (14014557).

28539747 is a wasteful number, since it uses less digits than its factorization.

28539747 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 102330 (or 102327 counting only the distinct ones).

The product of its digits is 423360, while the sum is 45.

The square root of 28539747 is about 5342.2604766147. The cubic root of 28539747 is about 305.5976706590.

The spelling of 28539747 in words is "twenty-eight million, five hundred thirty-nine thousand, seven hundred forty-seven".