30120399 has 6 divisors (see below), whose sum is σ = 43507256. Its totient is φ = 20080260.

The previous prime is 30120383. The next prime is 30120427. The reversal of 30120399 is 99302103.

It is not a de Polignac number, because 30120399 - 2⁴ = 30120383 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30120799) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1673347 + ... + 1673364.

Almost surely, 2^30120399 is an apocalyptic number.

30120399 is a deficient number, since it is larger than the sum of its proper divisors (13386857).

30120399 is a wasteful number, since it uses less digits than its factorization.

30120399 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3346717 (or 3346714 counting only the distinct ones).

The product of its (nonzero) digits is 1458, while the sum is 27.

The square root of 30120399 is about 5488.2054444053. The cubic root of 30120399 is about 311.1383709627.

The spelling of 30120399 in words is "thirty million, one hundred twenty thousand, three hundred ninety-nine".