28761575 has 18 divisors (see below), whose sum is σ = 36315384. Its totient is φ = 22595920.

The previous prime is 28761553. The next prime is 28761587. The reversal of 28761575 is 57516782.

It is not a de Polignac number, because 28761575 - 2¹⁰ = 28760551 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 172142 + ... + 172308.

Almost surely, 2^28761575 is an apocalyptic number.

28761575 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

28761575 is a deficient number, since it is larger than the sum of its proper divisors (7553809).

28761575 is an equidigital number, since it uses as much as digits as its factorization.

28761575 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 343 (or 255 counting only the distinct ones).

The product of its digits is 117600, while the sum is 41.

The square root of 28761575 is about 5362.9819130778. The cubic root of 28761575 is about 306.3873908045.

The spelling of 28761575 in words is "twenty-eight million, seven hundred sixty-one thousand, five hundred seventy-five".