28621422 has 12 divisors (see below), whose sum is σ = 62013120. Its totient is φ = 9540468.

The previous prime is 28621399. The next prime is 28621427. The reversal of 28621422 is 22412682.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28621427) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 795022 + ... + 795057.

It is an arithmetic number, because the mean of its divisors is an integer number (5167760).

Almost surely, 2^28621422 is an apocalyptic number.

28621422 is an abundant number, since it is smaller than the sum of its proper divisors (33391698).

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

28621422 is a wasteful number, since it uses less digits than its factorization.

28621422 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1590087 (or 1590084 counting only the distinct ones).

The product of its digits is 3072, while the sum is 27.

The square root of 28621422 is about 5349.8992513878. The cubic root of 28621422 is about 305.8889126436. Note that the first 3 decimals are identical.

The spelling of 28621422 in words is "twenty-eight million, six hundred twenty-one thousand, four hundred twenty-two".