28201422 has 32 divisors (see below), whose sum is σ = 57503520. Its totient is φ = 9219200.

The previous prime is 28201417. The next prime is 28201451. The reversal of 28201422 is 22410282.

It is a happy number.

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, 104704 + ... + 104972.

It is an arithmetic number, because the mean of its divisors is an integer number (1796985).

Almost surely, 2^28201422 is an apocalyptic number.

28201422 is an abundant number, since it is smaller than the sum of its proper divisors (29302098).

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

28201422 is a wasteful number, since it uses less digits than its factorization.

28201422 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 548.

The product of its (nonzero) digits is 512, while the sum is 21.

The square root of 28201422 is about 5310.5011062987. The cubic root of 28201422 is about 304.3852960297.

The spelling of 28201422 in words is "twenty-eight million, two hundred one thousand, four hundred twenty-two".