28723161600000 has 2496 divisors, whose sum is σ = 125805707919360. Its totient is φ = 6336921600000.

The previous prime is 28723161599939. The next prime is 28723161600037. The reversal of 28723161600000 is 616132782.

28723161600000 is a `hidden beast` number, since 2 + 8 + 7 + 2 + 31 + 616 + 0 + 0 + 0 + 0 + 0 = 666.

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

It is an unprimeable number.

It is a polite number, since it can be written in 191 ways as a sum of consecutive naturals, for example, 74995199809 + ... + 74995200191.

Almost surely, 2^{28723161600000} is an apocalyptic number.

28723161600000 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 28723161600000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (62902853959680).

28723161600000 is an abundant number, since it is smaller than the sum of its proper divisors (97082546319360).

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

28723161600000 is an frugal number, since it uses more digits than its factorization.

28723161600000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 479 (or 431 counting only the distinct ones).

The product of its (nonzero) digits is 24192, while the sum is 36.

Adding to 28723161600000 its reverse (616132782), we get a palindrome (28723777732782).

The spelling of 28723161600000 in words is "twenty-eight trillion, seven hundred twenty-three billion, one hundred sixty-one million, six hundred thousand".