28593081 has 48 divisors (see below), whose sum is σ = 49271040. Its totient is φ = 16387920.

The previous prime is 28593073. The next prime is 28593091. The reversal of 28593081 is 18039582.

It is not a de Polignac number, because 28593081 - 2³ = 28593073 is a prime.

It is a super-2 number, since 2×28593081² = 1635128562145122, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28593041) 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, 50506 + ... + 51068.

It is an arithmetic number, because the mean of its divisors is an integer number (1026480).

Almost surely, 2^28593081 is an apocalyptic number.

It is an amenable number.

28593081 is a deficient number, since it is larger than the sum of its proper divisors (20677959).

28593081 is a wasteful number, since it uses less digits than its factorization.

28593081 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 608 (or 596 counting only the distinct ones).

The product of its (nonzero) digits is 17280, while the sum is 36.

The square root of 28593081 is about 5347.2498538969. The cubic root of 28593081 is about 305.7879153245.

The spelling of 28593081 in words is "twenty-eight million, five hundred ninety-three thousand, eighty-one".