30047405 has 4 divisors (see below), whose sum is σ = 36056892. Its totient is φ = 24037920.

The previous prime is 30047389. The next prime is 30047471. The reversal of 30047405 is 50474003.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 50474003 = 17 ⋅2969059.

It can be written as a sum of positive squares in 2 ways, for example, as 4937284 + 25110121 = 2222^2 + 5011^2 .

It is not a de Polignac number, because 30047405 - 2⁴ = 30047389 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3004736 + ... + 3004745.

It is an arithmetic number, because the mean of its divisors is an integer number (9014223).

Almost surely, 2^30047405 is an apocalyptic number.

It is an amenable number.

30047405 is a deficient number, since it is larger than the sum of its proper divisors (6009487).

30047405 is an equidigital number, since it uses as much as digits as its factorization.

30047405 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6009486.

The product of its (nonzero) digits is 1680, while the sum is 23.

The square root of 30047405 is about 5481.5513315119. The cubic root of 30047405 is about 310.8868293061.

The spelling of 30047405 in words is "thirty million, forty-seven thousand, four hundred five".