30478973 has 8 divisors (see below), whose sum is σ = 34894848. Its totient is φ = 26078544.

The previous prime is 30478961. The next prime is 30478997. The reversal of 30478973 is 37987403.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 30478973 - 2⁴ = 30478957 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 30478973.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30478073) 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 7 ways as a sum of consecutive naturals, for example, 740 + ... + 7842.

It is an arithmetic number, because the mean of its divisors is an integer number (4361856).

Almost surely, 2^30478973 is an apocalyptic number.

It is an amenable number.

30478973 is a deficient number, since it is larger than the sum of its proper divisors (4415875).

30478973 is an equidigital number, since it uses as much as digits as its factorization.

30478973 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7723.

The product of its (nonzero) digits is 127008, while the sum is 41.

The square root of 30478973 is about 5520.7764852419. The cubic root of 30478973 is about 312.3681722364.

The spelling of 30478973 in words is "thirty million, four hundred seventy-eight thousand, nine hundred seventy-three".