28729028571900 has 72 divisors (see below), whose sum is σ = 83132574174720. Its totient is φ = 7660160168640.

The previous prime is 28729028571889. The next prime is 28729028571959. The reversal of 28729028571900 is 917582092782.

It is a super-2 number, since 2×28729028571900² (a number of 28 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (60).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3192940 + ... + 8225139.

It is an arithmetic number, because the mean of its divisors is an integer number (1154619085760).

Almost surely, 2^{28729028571900} is an apocalyptic number.

28729028571900 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28729028571900 is an abundant number, since it is smaller than the sum of its proper divisors (54403545602820).

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

28729028571900 is a wasteful number, since it uses less digits than its factorization.

28729028571900 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11426483 (or 11426476 counting only the distinct ones).

The product of its (nonzero) digits is 10160640, while the sum is 60.

The spelling of 28729028571900 in words is "twenty-eight trillion, seven hundred twenty-nine billion, twenty-eight million, five hundred seventy-one thousand, nine hundred".