20258928 has 60 divisors (see below), whose sum is σ = 57016440. Its totient is φ = 6715008.

The previous prime is 20258923. The next prime is 20258939. The reversal of 20258928 is 82985202.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 20258892 and 20258901.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20258923) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 38475 + ... + 38997.

It is an arithmetic number, because the mean of its divisors is an integer number (950274).

Almost surely, 2^20258928 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20258928, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28508220).

20258928 is an abundant number, since it is smaller than the sum of its proper divisors (36757512).

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

20258928 is a wasteful number, since it uses less digits than its factorization.

20258928 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 806 (or 797 counting only the distinct ones).

The product of its (nonzero) digits is 23040, while the sum is 36.

The square root of 20258928 is about 4500.9918906837. The cubic root of 20258928 is about 272.6081404533.

The spelling of 20258928 in words is "twenty million, two hundred fifty-eight thousand, nine hundred twenty-eight".