28042575 has 48 divisors (see below), whose sum is σ = 53270400. Its totient is φ = 12873600.

The previous prime is 28042561. The next prime is 28042577. The reversal of 28042575 is 57524082.

28042575 = T₄₁₀ + T₄₁₁ + ... + T₆₁₈.

It is not a de Polignac number, because 28042575 - 2⁷ = 28042447 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28042577) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 14781 + ... + 16569.

It is an arithmetic number, because the mean of its divisors is an integer number (1109800).

Almost surely, 2^28042575 is an apocalyptic number.

28042575 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

28042575 is a deficient number, since it is larger than the sum of its proper divisors (25227825).

28042575 is a wasteful number, since it uses less digits than its factorization.

28042575 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1832 (or 1827 counting only the distinct ones).

The product of its (nonzero) digits is 22400, while the sum is 33.

The square root of 28042575 is about 5295.5240533870. The cubic root of 28042575 is about 303.8127273119.

The spelling of 28042575 in words is "twenty-eight million, forty-two thousand, five hundred seventy-five".