28220367 has 16 divisors (see below), whose sum is σ = 43081472. Its totient is φ = 16096320.

The previous prime is 28220359. The next prime is 28220383. The reversal of 28220367 is 76302282.

It is not a de Polignac number, because 28220367 - 2³ = 28220359 is a prime.

It is a super-2 number, since 2×28220367² = 1592778227229378, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28220317) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 16203 + ... + 17859.

It is an arithmetic number, because the mean of its divisors is an integer number (2692592).

Almost surely, 2^28220367 is an apocalyptic number.

28220367 is a deficient number, since it is larger than the sum of its proper divisors (14861105).

28220367 is a wasteful number, since it uses less digits than its factorization.

28220367 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2478.

The product of its (nonzero) digits is 8064, while the sum is 30.

The square root of 28220367 is about 5312.2845368071. The cubic root of 28220367 is about 304.4534402133.

The spelling of 28220367 in words is "twenty-eight million, two hundred twenty thousand, three hundred sixty-seven".