28538545 has 16 divisors (see below), whose sum is σ = 39783168. Its totient is φ = 19247040.

The previous prime is 28538537. The next prime is 28538579. The reversal of 28538545 is 54583582.

It is not a de Polignac number, because 28538545 - 2³ = 28538537 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 28538498 and 28538507.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4549 + ... + 8818.

It is an arithmetic number, because the mean of its divisors is an integer number (2486448).

Almost surely, 2^28538545 is an apocalyptic number.

It is an amenable number.

28538545 is a deficient number, since it is larger than the sum of its proper divisors (11244623).

28538545 is a wasteful number, since it uses less digits than its factorization.

28538545 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13440.

The product of its digits is 192000, while the sum is 40.

The square root of 28538545 is about 5342.1479762358. The cubic root of 28538545 is about 305.5933803435.

The spelling of 28538545 in words is "twenty-eight million, five hundred thirty-eight thousand, five hundred forty-five".