30117940 has 24 divisors (see below), whose sum is σ = 63397152. Its totient is φ = 12018720.

The previous prime is 30117937. The next prime is 30117947. The reversal of 30117940 is 4971103.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30117947) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8287 + ... + 11353.

It is an arithmetic number, because the mean of its divisors is an integer number (2641548).

Almost surely, 2^30117940 is an apocalyptic number.

It is an amenable number.

30117940 is an abundant number, since it is smaller than the sum of its proper divisors (33279212).

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

30117940 is a wasteful number, since it uses less digits than its factorization.

30117940 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3567 (or 3565 counting only the distinct ones).

The product of its (nonzero) digits is 756, while the sum is 25.

The square root of 30117940 is about 5487.9814139627. The cubic root of 30117940 is about 311.1299037212.

The spelling of 30117940 in words is "thirty million, one hundred seventeen thousand, nine hundred forty".