28730063331 has 24 divisors (see below), whose sum is σ = 42939992160. Its totient is φ = 18488601600.

The previous prime is 28730063279. The next prime is 28730063339. The reversal of 28730063331 is 13336003782.

It is a happy number.

It is not a de Polignac number, because 28730063331 - 2⁷ = 28730063203 is a prime.

It is a super-2 number, since 2×28730063331² (a number of 22 digits) contains 22 as substring.

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (28730063339) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1409986 + ... + 1430216.

It is an arithmetic number, because the mean of its divisors is an integer number (1789166340).

Almost surely, 2^28730063331 is an apocalyptic number.

28730063331 is a deficient number, since it is larger than the sum of its proper divisors (14209928829).

28730063331 is a wasteful number, since it uses less digits than its factorization.

28730063331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25707 (or 25704 counting only the distinct ones).

The product of its (nonzero) digits is 54432, while the sum is 36.

The spelling of 28730063331 in words is "twenty-eight billion, seven hundred thirty million, sixty-three thousand, three hundred thirty-one".