28720692000 has 1152 divisors, whose sum is σ = 137028423168. Its totient is φ = 5501952000.

The previous prime is 28720691959. The next prime is 28720692017. The reversal of 28720692000 is 29602782.

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, 36035602 + ... + 36036398.

It is an arithmetic number, because the mean of its divisors is an integer number (118948284).

Almost surely, 2^28720692000 is an apocalyptic number.

28720692000 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 28720692000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (68514211584).

28720692000 is an abundant number, since it is smaller than the sum of its proper divisors (108307731168).

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

28720692000 is a wasteful number, since it uses less digits than its factorization.

28720692000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 859 (or 838 counting only the distinct ones).

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

The spelling of 28720692000 in words is "twenty-eight billion, seven hundred twenty million, six hundred ninety-two thousand".