28264047 has 32 divisors (see below), whose sum is σ = 46738944. Its totient is φ = 14822400.

The previous prime is 28264031. The next prime is 28264051. The reversal of 28264047 is 74046282.

It is not a de Polignac number, because 28264047 - 2⁴ = 28264031 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 28263999 and 28264017.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28264007) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 13672 + ... + 15602.

It is an arithmetic number, because the mean of its divisors is an integer number (1460592).

Almost surely, 2^28264047 is an apocalyptic number.

28264047 is a deficient number, since it is larger than the sum of its proper divisors (18474897).

28264047 is a wasteful number, since it uses less digits than its factorization.

28264047 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1999.

The product of its (nonzero) digits is 21504, while the sum is 33.

The square root of 28264047 is about 5316.3941727453. The cubic root of 28264047 is about 304.6104387731.

The spelling of 28264047 in words is "twenty-eight million, two hundred sixty-four thousand, forty-seven".