30728179449 has 24 divisors (see below), whose sum is σ = 48566497824. Its totient is φ = 18566856000.

The previous prime is 30728179409. The next prime is 30728179477. The reversal of 30728179449 is 94497182703.

30728179449 is a `hidden beast` number, since 3 + 0 + 7 + 28 + 179 + 449 = 666.

It is not a de Polignac number, because 30728179449 - 2²¹ = 30726082297 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 30728179395 and 30728179404.

It is not an unprimeable number, because it can be changed into a prime (30728179409) 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, 436092 + ... + 501629.

It is an arithmetic number, because the mean of its divisors is an integer number (2023604076).

Almost surely, 2^30728179449 is an apocalyptic number.

It is an amenable number.

30728179449 is a deficient number, since it is larger than the sum of its proper divisors (17838318375).

30728179449 is a wasteful number, since it uses less digits than its factorization.

30728179449 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 938069 (or 938066 counting only the distinct ones).

The product of its (nonzero) digits is 3048192, while the sum is 54.

The spelling of 30728179449 in words is "thirty billion, seven hundred twenty-eight million, one hundred seventy-nine thousand, four hundred forty-nine".