28513050720 has 576 divisors, whose sum is σ = 118237625856. Its totient is φ = 5610332160.

The previous prime is 28513050649. The next prime is 28513050749. The reversal of 28513050720 is 2705031582.

It is a super-2 number, since 2×28513050720² (a number of 22 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 13341492 + ... + 13343628.

It is an arithmetic number, because the mean of its divisors is an integer number (205273656).

Almost surely, 2^28513050720 is an apocalyptic number.

28513050720 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 28513050720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (59118812928).

28513050720 is an abundant number, since it is smaller than the sum of its proper divisors (89724575136).

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

28513050720 is a wasteful number, since it uses less digits than its factorization.

28513050720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2211 (or 2184 counting only the distinct ones).

The product of its (nonzero) digits is 16800, while the sum is 33.

The spelling of 28513050720 in words is "twenty-eight billion, five hundred thirteen million, fifty thousand, seven hundred twenty".