28923000 has 128 divisors (see below), whose sum is σ = 93450240. Its totient is φ = 7440000.

The previous prime is 28922987. The next prime is 28923019. The reversal of 28923000 is 32982.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 92845 + ... + 93155.

It is an arithmetic number, because the mean of its divisors is an integer number (730080).

Almost surely, 2^28923000 is an apocalyptic number.

28923000 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28923000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (46725120).

28923000 is an abundant number, since it is smaller than the sum of its proper divisors (64527240).

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

28923000 is a wasteful number, since it uses less digits than its factorization.

28923000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 366 (or 352 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 24.

The square root of 28923000 is about 5378.0107846675. The cubic root of 28923000 is about 306.9595238541.

Adding to 28923000 its reverse (32982), we get a palindrome (28955982).

The spelling of 28923000 in words is "twenty-eight million, nine hundred twenty-three thousand".