28423723284 has 240 divisors, whose sum is σ = 86056555200. Its totient is φ = 8157568320.

The previous prime is 28423723259. The next prime is 28423723319. The reversal of 28423723284 is 48232732482.

28423723284 is a `hidden beast` number, since 284 + 23 + 72 + 3 + 284 = 666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 8191902 + ... + 8195370.

It is an arithmetic number, because the mean of its divisors is an integer number (358568980).

Almost surely, 2^28423723284 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 28423723284, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (43028277600).

28423723284 is an abundant number, since it is smaller than the sum of its proper divisors (57632831916).

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

28423723284 is a wasteful number, since it uses less digits than its factorization.

28423723284 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3537 (or 3504 counting only the distinct ones).

The product of its digits is 1032192, while the sum is 45.

The spelling of 28423723284 in words is "twenty-eight billion, four hundred twenty-three million, seven hundred twenty-three thousand, two hundred eighty-four".