30139390449 has 45 divisors (see below), whose sum is σ = 50830472459. Its totient is φ = 17207925840.

The previous prime is 30139390363. The next prime is 30139390453. The reversal of 30139390449 is 94409393103.

The square root of 30139390449 is 173607.

It is a perfect power (a square), and thus also a powerful number.

30139390449 is a `hidden beast` number, since 30 + 1 + 3 + 93 + 90 + 449 = 666.

It can be written as a sum of positive squares in only one way, i.e., 27641390049 + 2498000400 = 166257^2 + 49980^2 .

It is not a de Polignac number, because 30139390449 - 2²⁹ = 29602519537 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (30139390459) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 44 ways as a sum of consecutive naturals, for example, 25519639 + ... + 25520819.

Almost surely, 2^30139390449 is an apocalyptic number.

30139390449 is the 173607-th square number.

30139390449 is the 86804-th centered octagonal number.

It is an amenable number.

30139390449 is a deficient number, since it is larger than the sum of its proper divisors (20691082010).

30139390449 is an frugal number, since it uses more digits than its factorization.

30139390449 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2396 (or 1191 counting only the distinct ones).

The product of its (nonzero) digits is 314928, while the sum is 45.

The spelling of 30139390449 in words is "thirty billion, one hundred thirty-nine million, three hundred ninety thousand, four hundred forty-nine".