30798938 has 4 divisors (see below), whose sum is σ = 46198410. Its totient is φ = 15399468.

The previous prime is 30798907. The next prime is 30798953. The reversal of 30798938 is 83989703.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 83989703 = 7 ⋅11998529.

It can be written as a sum of positive squares in only one way, i.e., 30393169 + 405769 = 5513^2 + 637^2 .

It is a junction number, because it is equal to n+sod(n) for n = 30798892 and 30798901.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7699733 + ... + 7699736.

Almost surely, 2^30798938 is an apocalyptic number.

30798938 is a deficient number, since it is larger than the sum of its proper divisors (15399472).

30798938 is a wasteful number, since it uses less digits than its factorization.

30798938 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15399471.

The product of its (nonzero) digits is 326592, while the sum is 47.

The square root of 30798938 is about 5549.6790898213. The cubic root of 30798938 is about 313.4574386402.

The spelling of 30798938 in words is "thirty million, seven hundred ninety-eight thousand, nine hundred thirty-eight".