30312040 has 32 divisors (see below), whose sum is σ = 74403360. Its totient is φ = 11022400.

The previous prime is 30312013. The next prime is 30312053. The reversal of 30312040 is 4021303.

It is a self number, because there is not a number n which added to its sum of digits gives 30312040.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 34006 + ... + 34885.

It is an arithmetic number, because the mean of its divisors is an integer number (2325105).

Almost surely, 2^30312040 is an apocalyptic number.

It is an amenable number.

30312040 is an abundant number, since it is smaller than the sum of its proper divisors (44091320).

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

30312040 is a wasteful number, since it uses less digits than its factorization.

30312040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 68913 (or 68909 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 13.

The square root of 30312040 is about 5505.6371111798. The cubic root of 30312040 is about 311.7968489046.

Adding to 30312040 its reverse (4021303), we get a palindrome (34333343).

The spelling of 30312040 in words is "thirty million, three hundred twelve thousand, forty".