28923365790 has 160 divisors (see below), whose sum is σ = 89307757440. Its totient is φ = 6642648000.

The previous prime is 28923365773. The next prime is 28923365797. The reversal of 28923365790 is 9756332982.

It is a happy number.

28923365790 is a `hidden beast` number, since 289 + 233 + 65 + 79 + 0 = 666.

It is a super-2 number, since 2×28923365790² (a number of 22 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28923365797) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 83865 + ... + 254715.

It is an arithmetic number, because the mean of its divisors is an integer number (558173484).

Almost surely, 2^28923365790 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28923365790, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (44653878720).

28923365790 is an abundant number, since it is smaller than the sum of its proper divisors (60384391650).

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

28923365790 is a wasteful number, since it uses less digits than its factorization.

28923365790 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 170900 (or 170891 counting only the distinct ones).

The product of its (nonzero) digits is 4898880, while the sum is 54.

The spelling of 28923365790 in words is "twenty-eight billion, nine hundred twenty-three million, three hundred sixty-five thousand, seven hundred ninety".