30444157 has 4 divisors (see below), whose sum is σ = 31767840. Its totient is φ = 29120476.

The previous prime is 30444143. The next prime is 30444163. The reversal of 30444157 is 75144403.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-30444157 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 (30444107) 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 3 ways as a sum of consecutive naturals, for example, 661807 + ... + 661852.

It is an arithmetic number, because the mean of its divisors is an integer number (7941960).

Almost surely, 2^30444157 is an apocalyptic number.

It is an amenable number.

30444157 is a deficient number, since it is larger than the sum of its proper divisors (1323683).

30444157 is a wasteful number, since it uses less digits than its factorization.

30444157 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1323682.

The product of its (nonzero) digits is 6720, while the sum is 28.

The square root of 30444157 is about 5517.6224046232. The cubic root of 30444157 is about 312.2491879792.

The spelling of 30444157 in words is "thirty million, four hundred forty-four thousand, one hundred fifty-seven".