30397940 has 24 divisors (see below), whose sum is σ = 64737792. Its totient is φ = 11987360.

The previous prime is 30397931. The next prime is 30397943. The reversal of 30397940 is 4979303.

It is a self number, because there is not a number n which added to its sum of digits gives 30397940.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30397943) 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, 9284 + ... + 12123.

It is an arithmetic number, because the mean of its divisors is an integer number (2697408).

Almost surely, 2^30397940 is an apocalyptic number.

It is an amenable number.

30397940 is an abundant number, since it is smaller than the sum of its proper divisors (34339852).

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

30397940 is a wasteful number, since it uses less digits than its factorization.

30397940 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21487 (or 21485 counting only the distinct ones).

The product of its (nonzero) digits is 20412, while the sum is 35.

The square root of 30397940 is about 5513.4326875369. The cubic root of 30397940 is about 312.0911003969.

The spelling of 30397940 in words is "thirty million, three hundred ninety-seven thousand, nine hundred forty".