28611575 has 12 divisors (see below), whose sum is σ = 35680008. Its totient is φ = 22759200.

The previous prime is 28611559. The next prime is 28611589. The reversal of 28611575 is 57511682.

It is not a de Polignac number, because 28611575 - 2⁴ = 28611559 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 11 ways as a sum of consecutive naturals, for example, 1364 + ... + 7686.

It is an arithmetic number, because the mean of its divisors is an integer number (2973334).

Almost surely, 2^28611575 is an apocalyptic number.

28611575 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

28611575 is a deficient number, since it is larger than the sum of its proper divisors (7068433).

28611575 is a wasteful number, since it uses less digits than its factorization.

28611575 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6514 (or 6509 counting only the distinct ones).

The product of its digits is 16800, while the sum is 35.

The square root of 28611575 is about 5348.9788745143. The cubic root of 28611575 is about 305.8538289731.

The spelling of 28611575 in words is "twenty-eight million, six hundred eleven thousand, five hundred seventy-five".