28749820652320 has 24 divisors (see below), whose sum is σ = 67921451291484. Its totient is φ = 11499928260864.

The previous prime is 28749820652303. The next prime is 28749820652321. The reversal of 28749820652320 is 2325602894782.

It can be written as a sum of positive squares in 2 ways, for example, as 28734445644304 + 15375008016 = 5360452^2 + 123996^2 .

It is not an unprimeable number, because it can be changed into a prime (28749820652321) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 89843189379 + ... + 89843189698.

Almost surely, 2^{28749820652320} is an apocalyptic number.

28749820652320 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28749820652320 is an abundant number, since it is smaller than the sum of its proper divisors (39171630639164).

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

28749820652320 is a wasteful number, since it uses less digits than its factorization.

28749820652320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 179686379092 (or 179686379084 counting only the distinct ones).

The product of its (nonzero) digits is 23224320, while the sum is 58.

The spelling of 28749820652320 in words is "twenty-eight trillion, seven hundred forty-nine billion, eight hundred twenty million, six hundred fifty-two thousand, three hundred twenty".