28539957 has 16 divisors (see below), whose sum is σ = 42413760. Its totient is φ = 16964352.

The previous prime is 28539949. The next prime is 28539967. The reversal of 28539957 is 75993582.

It is a happy number.

It is not a de Polignac number, because 28539957 - 2³ = 28539949 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28539947) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 13758 + ... + 15695.

It is an arithmetic number, because the mean of its divisors is an integer number (2650860).

Almost surely, 2^28539957 is an apocalyptic number.

It is an amenable number.

28539957 is a deficient number, since it is larger than the sum of its proper divisors (13873803).

28539957 is a wasteful number, since it uses less digits than its factorization.

28539957 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29492.

The product of its digits is 680400, while the sum is 48.

The square root of 28539957 is about 5342.2801311799. The cubic root of 28539957 is about 305.5984202026.

The spelling of 28539957 in words is "twenty-eight million, five hundred thirty-nine thousand, nine hundred fifty-seven".