30478215 has 16 divisors (see below), whose sum is σ = 49241088. Its totient is φ = 16096416.

The previous prime is 30478213. The next prime is 30478219. The reversal of 30478215 is 51287403.

It is not a de Polignac number, because 30478215 - 2¹ = 30478213 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30478213) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8319 + ... + 11408.

It is an arithmetic number, because the mean of its divisors is an integer number (3077568).

Almost surely, 2^30478215 is an apocalyptic number.

30478215 is a deficient number, since it is larger than the sum of its proper divisors (18762873).

30478215 is a wasteful number, since it uses less digits than its factorization.

30478215 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19838.

The product of its (nonzero) digits is 6720, while the sum is 30.

The square root of 30478215 is about 5520.7078350516. The cubic root of 30478215 is about 312.3655827240.

The spelling of 30478215 in words is "thirty million, four hundred seventy-eight thousand, two hundred fifteen".