28522422 has 32 divisors (see below), whose sum is σ = 63897600. Its totient is φ = 9430344.

The previous prime is 28522411. The next prime is 28522463. The reversal of 28522422 is 22422582.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4779 + ... + 8937.

It is an arithmetic number, because the mean of its divisors is an integer number (1996800).

Almost surely, 2^28522422 is an apocalyptic number.

28522422 is an abundant number, since it is smaller than the sum of its proper divisors (35375178).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

28522422 is a wasteful number, since it uses less digits than its factorization.

28522422 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4297 (or 4291 counting only the distinct ones).

The product of its digits is 5120, while the sum is 27.

The square root of 28522422 is about 5340.6387258454. The cubic root of 28522422 is about 305.5358206440.

The spelling of 28522422 in words is "twenty-eight million, five hundred twenty-two thousand, four hundred twenty-two".