28539892 has 6 divisors (see below), whose sum is σ = 49944818. Its totient is φ = 14269944.

The previous prime is 28539877. The next prime is 28539947. The reversal of 28539892 is 29893582.

It can be written as a sum of positive squares in only one way, i.e., 15319396 + 13220496 = 3914^2 + 3636^2 .

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3567483 + ... + 3567490.

Almost surely, 2^28539892 is an apocalyptic number.

It is an amenable number.

28539892 is a deficient number, since it is larger than the sum of its proper divisors (21404926).

28539892 is a wasteful number, since it uses less digits than its factorization.

28539892 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7134977 (or 7134975 counting only the distinct ones).

The product of its digits is 311040, while the sum is 46.

The square root of 28539892 is about 5342.2740476318. The cubic root of 28539892 is about 305.5981882014.

The spelling of 28539892 in words is "twenty-eight million, five hundred thirty-nine thousand, eight hundred ninety-two".