30288729123 has 24 divisors (see below), whose sum is σ = 44519829120. Its totient is φ = 19838136960.

The previous prime is 30288729091. The next prime is 30288729143. The reversal of 30288729123 is 32192788203.

It is not a de Polignac number, because 30288729123 - 2⁵ = 30288729091 is a prime.

It is a super-2 number, since 2×30288729123² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (30288729143) 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, 441823 + ... + 505751.

It is an arithmetic number, because the mean of its divisors is an integer number (1854992880).

Almost surely, 2^30288729123 is an apocalyptic number.

30288729123 is a deficient number, since it is larger than the sum of its proper divisors (14231099997).

30288729123 is a wasteful number, since it uses less digits than its factorization.

30288729123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 64859 (or 64856 counting only the distinct ones).

The product of its (nonzero) digits is 290304, while the sum is 45.

The spelling of 30288729123 in words is "thirty billion, two hundred eighty-eight million, seven hundred twenty-nine thousand, one hundred twenty-three".