28583331 has 16 divisors (see below), whose sum is σ = 43680000. Its totient is φ = 16286688.

The previous prime is 28583309. The next prime is 28583371. The reversal of 28583331 is 13338582.

It is a de Polignac number, because none of the positive numbers 2^k-28583331 is a prime.

It is a super-2 number, since 2×28583331² = 1634013622111122, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 28583292 and 28583301.

It is not an unprimeable number, because it can be changed into a prime (28583371) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6420 + ... + 9918.

It is an arithmetic number, because the mean of its divisors is an integer number (2730000).

Almost surely, 2^28583331 is an apocalyptic number.

28583331 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

28583331 is a deficient number, since it is larger than the sum of its proper divisors (15096669).

28583331 is a wasteful number, since it uses less digits than its factorization.

28583331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3898.

The product of its digits is 17280, while the sum is 33.

The square root of 28583331 is about 5346.3380925639. The cubic root of 28583331 is about 305.7531543379.

The spelling of 28583331 in words is "twenty-eight million, five hundred eighty-three thousand, three hundred thirty-one".