30420752438 has 4 divisors (see below), whose sum is σ = 45631128660. Its totient is φ = 15210376218.

The previous prime is 30420752393. The next prime is 30420752449. The reversal of 30420752438 is 83425702403.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7605188108 + ... + 7605188111.

It is an arithmetic number, because the mean of its divisors is an integer number (11407782165).

Almost surely, 2^30420752438 is an apocalyptic number.

30420752438 is a deficient number, since it is larger than the sum of its proper divisors (15210376222).

30420752438 is a wasteful number, since it uses less digits than its factorization.

30420752438 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15210376221.

The product of its (nonzero) digits is 161280, while the sum is 38.

The spelling of 30420752438 in words is "thirty billion, four hundred twenty million, seven hundred fifty-two thousand, four hundred thirty-eight".