28539460 has 48 divisors (see below), whose sum is σ = 61714800. Its totient is φ = 11082240.

The previous prime is 28539449. The next prime is 28539479. The reversal of 28539460 is 6493582.

It can be written as a sum of positive squares in 8 ways, for example, as 11778624 + 16760836 = 3432^2 + 4094^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 181702 + ... + 181858.

It is an arithmetic number, because the mean of its divisors is an integer number (1285725).

Almost surely, 2^28539460 is an apocalyptic number.

28539460 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28539460 is an abundant number, since it is smaller than the sum of its proper divisors (33175340).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

28539460 is a wasteful number, since it uses less digits than its factorization.

28539460 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 376 (or 374 counting only the distinct ones).

The product of its (nonzero) digits is 51840, while the sum is 37.

The square root of 28539460 is about 5342.2336152587. The cubic root of 28539460 is about 305.5966462768.

The spelling of 28539460 in words is "twenty-eight million, five hundred thirty-nine thousand, four hundred sixty".