28033047 has 40 divisors (see below), whose sum is σ = 48884000. Its totient is φ = 16003008.

The previous prime is 28033043. The next prime is 28033063. The reversal of 28033047 is 74033082.

It is not a de Polignac number, because 28033047 - 2² = 28033043 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 28033047.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28033043) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 27279 + ... + 28287.

It is an arithmetic number, because the mean of its divisors is an integer number (1222100).

Almost surely, 2^28033047 is an apocalyptic number.

28033047 is a gapful number since it is divisible by the number (27) formed by its first and last digit.

28033047 is a deficient number, since it is larger than the sum of its proper divisors (20850953).

28033047 is an equidigital number, since it uses as much as digits as its factorization.

28033047 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1042 (or 1019 counting only the distinct ones).

The product of its (nonzero) digits is 4032, while the sum is 27.

The square root of 28033047 is about 5294.6243492811. The cubic root of 28033047 is about 303.7783146902.

The spelling of 28033047 in words is "twenty-eight million, thirty-three thousand, forty-seven".