30240491 has 8 divisors (see below), whose sum is σ = 30660864. Its totient is φ = 29822760.

The previous prime is 30240473. The next prime is 30240499. The reversal of 30240491 is 19404203.

30240491 = 276² + 277² + ... + 481².

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-30240491 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (30240499) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 33650 + ... + 34536.

It is an arithmetic number, because the mean of its divisors is an integer number (3832608).

Almost surely, 2^30240491 is an apocalyptic number.

30240491 is a deficient number, since it is larger than the sum of its proper divisors (420373).

30240491 is a wasteful number, since it uses less digits than its factorization.

30240491 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1321.

The product of its (nonzero) digits is 864, while the sum is 23.

The square root of 30240491 is about 5499.1354775092. The cubic root of 30240491 is about 311.5513322888.

Adding to 30240491 its reverse (19404203), we get a palindrome (49644694).

The spelling of 30240491 in words is "thirty million, two hundred forty thousand, four hundred ninety-one".