28583939 has 4 divisors (see below), whose sum is σ = 28663920. Its totient is φ = 28503960.

The previous prime is 28583927. The next prime is 28583941. The reversal of 28583939 is 93938582.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 93938582 = 2 ⋅46969291.

It is a cyclic number.

It is not a de Polignac number, because 28583939 - 2¹⁶ = 28518403 is a prime.

It is a super-3 number, since 3×28583939³ (a number of 23 digits) contains 333 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 28583893 and 28583902.

It is not an unprimeable number, because it can be changed into a prime (28583539) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 39452 + ... + 40169.

It is an arithmetic number, because the mean of its divisors is an integer number (7165980).

Almost surely, 2^28583939 is an apocalyptic number.

28583939 is a deficient number, since it is larger than the sum of its proper divisors (79981).

28583939 is an equidigital number, since it uses as much as digits as its factorization.

28583939 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 79980.

The product of its digits is 466560, while the sum is 47.

The square root of 28583939 is about 5346.3949536113. The cubic root of 28583939 is about 305.7553222284.

The spelling of 28583939 in words is "twenty-eight million, five hundred eighty-three thousand, nine hundred thirty-nine".