28372422 has 32 divisors (see below), whose sum is σ = 64707552. Its totient is φ = 8216064.

The previous prime is 28372417. The next prime is 28372433. The reversal of 28372422 is 22427382.

It is a self number, because there is not a number n which added to its sum of digits gives 28372422.

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, 9373 + ... + 12024.

It is an arithmetic number, because the mean of its divisors is an integer number (2022111).

Almost surely, 2^28372422 is an apocalyptic number.

28372422 is an abundant number, since it is smaller than the sum of its proper divisors (36335130).

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

28372422 is a wasteful number, since it uses less digits than its factorization.

28372422 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21432.

The product of its digits is 10752, while the sum is 30.

The square root of 28372422 is about 5326.5769495991. The cubic root of 28372422 is about 304.9992725952. Note that the first 3 decimals are identical.

The spelling of 28372422 in words is "twenty-eight million, three hundred seventy-two thousand, four hundred twenty-two".