30018940 has 48 divisors (see below), whose sum is σ = 76289472. Its totient is φ = 9686016.

The previous prime is 30018931. The next prime is 30018971. The reversal of 30018940 is 4981003.

It is a super-2 number, since 2×30018940² = 1802273517447200, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 3927 + ... + 8686.

It is an arithmetic number, because the mean of its divisors is an integer number (1589364).

Almost surely, 2^30018940 is an apocalyptic number.

It is an amenable number.

30018940 is an abundant number, since it is smaller than the sum of its proper divisors (46270532).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

30018940 is a wasteful number, since it uses less digits than its factorization.

30018940 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12646 (or 12644 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 25.

The square root of 30018940 is about 5478.9542797873. The cubic root of 30018940 is about 310.7886268211.

Adding to 30018940 its reverse (4981003), we get a palindrome (34999943).

The spelling of 30018940 in words is "thirty million, eighteen thousand, nine hundred forty".