28412993 has 12 divisors (see below), whose sum is σ = 33521472. Its totient is φ = 24008040.

The previous prime is 28412977. The next prime is 28413029. The reversal of 28412993 is 39921482.

It is not a de Polignac number, because 28412993 - 2⁴ = 28412977 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (28412963) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 605 + ... + 7562.

It is an arithmetic number, because the mean of its divisors is an integer number (2793456).

Almost surely, 2^28412993 is an apocalyptic number.

It is an amenable number.

28412993 is a deficient number, since it is larger than the sum of its proper divisors (5108479).

28412993 is an equidigital number, since it uses as much as digits as its factorization.

28412993 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8252 (or 8245 counting only the distinct ones).

The product of its digits is 31104, while the sum is 38.

The square root of 28412993 is about 5330.3839448955. The cubic root of 28412993 is about 305.1445807406.

The spelling of 28412993 in words is "twenty-eight million, four hundred twelve thousand, nine hundred ninety-three".