30442957 has 4 divisors (see below), whose sum is σ = 30460320. Its totient is φ = 30425596.

The previous prime is 30442943. The next prime is 30442963. The reversal of 30442957 is 75924403.

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-30442957 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 (30442927) 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, 5713 + ... + 9670.

It is an arithmetic number, because the mean of its divisors is an integer number (7615080).

Almost surely, 2^30442957 is an apocalyptic number.

It is an amenable number.

30442957 is a deficient number, since it is larger than the sum of its proper divisors (17363).

30442957 is a wasteful number, since it uses less digits than its factorization.

30442957 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17362.

The product of its (nonzero) digits is 30240, while the sum is 34.

The square root of 30442957 is about 5517.5136610615. The cubic root of 30442957 is about 312.2450853425.

The spelling of 30442957 in words is "thirty million, four hundred forty-two thousand, nine hundred fifty-seven".