30442491 has 18 divisors (see below), whose sum is σ = 44599308. Its totient is φ = 20009640.

The previous prime is 30442481. The next prime is 30442499. The reversal of 30442491 is 19424403.

It is not a de Polignac number, because 30442491 - 2¹⁷ = 30311419 is a prime.

It is not an unprimeable number, because it can be changed into a prime (30442499) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 61756 + ... + 62246.

Almost surely, 2^30442491 is an apocalyptic number.

30442491 is a deficient number, since it is larger than the sum of its proper divisors (14156817).

30442491 is an equidigital number, since it uses as much as digits as its factorization.

30442491 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 663 (or 577 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 27.

The square root of 30442491 is about 5517.4714317339. The cubic root of 30442491 is about 312.2434921228.

Adding to 30442491 its reverse (19424403), we get a palindrome (49866894).

The spelling of 30442491 in words is "thirty million, four hundred forty-two thousand, four hundred ninety-one".