28395822 has 64 divisors (see below), whose sum is σ = 70608384. Its totient is φ = 7413120.

The previous prime is 28395799. The next prime is 28395841. The reversal of 28395822 is 22859382.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 71328 + ... + 71724.

It is an arithmetic number, because the mean of its divisors is an integer number (1103256).

Almost surely, 2^28395822 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28395822, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (35304192).

28395822 is an abundant number, since it is smaller than the sum of its proper divisors (42212562).

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

28395822 is a wasteful number, since it uses less digits than its factorization.

28395822 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 553.

The product of its digits is 69120, while the sum is 39.

The square root of 28395822 is about 5328.7730295069. The cubic root of 28395822 is about 305.0830983823.

The spelling of 28395822 in words is "twenty-eight million, three hundred ninety-five thousand, eight hundred twenty-two".