30124399 has 4 divisors (see below), whose sum is σ = 30537136. Its totient is φ = 29711664.

The previous prime is 30124387. The next prime is 30124403. The reversal of 30124399 is 99342103.

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

It is a cyclic number.

It is not a de Polignac number, because 30124399 - 2⁹ = 30123887 is a prime.

It is a super-2 number, since 2×30124399² = 1814958830222402, which contains 22 as substring.

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 30124399.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30124379) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 206259 + ... + 206404.

It is an arithmetic number, because the mean of its divisors is an integer number (7634284).

Almost surely, 2^30124399 is an apocalyptic number.

30124399 is a deficient number, since it is larger than the sum of its proper divisors (412737).

30124399 is an equidigital number, since it uses as much as digits as its factorization.

30124399 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 412736.

The product of its (nonzero) digits is 5832, while the sum is 31.

The square root of 30124399 is about 5488.5698501522. The cubic root of 30124399 is about 311.1521434495.

The spelling of 30124399 in words is "thirty million, one hundred twenty-four thousand, three hundred ninety-nine".