28730032020320 has 48 divisors (see below), whose sum is σ = 67876680449088. Its totient is φ = 11491677603840.

The previous prime is 28730032020293. The next prime is 28730032020373. The reversal of 28730032020320 is 2302023003782.

It is a super-2 number, since 2×28730032020320² (a number of 28 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (32).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2920232 + ... + 8123288.

It is an arithmetic number, because the mean of its divisors is an integer number (1414097509356).

Almost surely, 2^{28730032020320} is an apocalyptic number.

28730032020320 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28730032020320 is an abundant number, since it is smaller than the sum of its proper divisors (39146648428768).

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

28730032020320 is a wasteful number, since it uses less digits than its factorization.

28730032020320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5237583 (or 5237575 counting only the distinct ones).

The product of its (nonzero) digits is 24192, while the sum is 32.

The spelling of 28730032020320 in words is "twenty-eight trillion, seven hundred thirty billion, thirty-two million, twenty thousand, three hundred twenty".