28223671 has 16 divisors (see below), whose sum is σ = 33619968. Its totient is φ = 23184000.

The previous prime is 28223659. The next prime is 28223687. The reversal of 28223671 is 17632282.

It is not a de Polignac number, because 28223671 - 2⁵ = 28223639 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (31).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28223651) 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, 23946 + ... + 25096.

It is an arithmetic number, because the mean of its divisors is an integer number (2101248).

Almost surely, 2^28223671 is an apocalyptic number.

28223671 is a deficient number, since it is larger than the sum of its proper divisors (5396297).

28223671 is a wasteful number, since it uses less digits than its factorization.

28223671 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1302.

The product of its digits is 8064, while the sum is 31.

The square root of 28223671 is about 5312.5955050239. The cubic root of 28223671 is about 304.4653214066.

The spelling of 28223671 in words is "twenty-eight million, two hundred twenty-three thousand, six hundred seventy-one".