28622718 has 48 divisors (see below), whose sum is σ = 66134016. Its totient is φ = 8925840.

The previous prime is 28622701. The next prime is 28622723. The reversal of 28622718 is 81722682.

It is a happy number.

28622718 is a `hidden beast` number, since 28 + 622 + 7 + 1 + 8 = 666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 18723 + ... + 20193.

It is an arithmetic number, because the mean of its divisors is an integer number (1377792).

Almost surely, 2^28622718 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28622718, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (33067008).

28622718 is an abundant number, since it is smaller than the sum of its proper divisors (37511298).

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

28622718 is a wasteful number, since it uses less digits than its factorization.

28622718 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1549 (or 1546 counting only the distinct ones).

The product of its digits is 21504, while the sum is 36.

The square root of 28622718 is about 5350.0203737930. The cubic root of 28622718 is about 305.8935295356.

Subtracting from 28622718 its sum of digits (36), we obtain a palindrome (28622682).

The spelling of 28622718 in words is "twenty-eight million, six hundred twenty-two thousand, seven hundred eighteen".