30121340 has 24 divisors (see below), whose sum is σ = 63467712. Its totient is φ = 12008000.

The previous prime is 30121321. The next prime is 30121349. The reversal of 30121340 is 4312103.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30121349) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3965 + ... + 8715.

It is an arithmetic number, because the mean of its divisors is an integer number (2644488).

Almost surely, 2^30121340 is an apocalyptic number.

It is an amenable number.

30121340 is an abundant number, since it is smaller than the sum of its proper divisors (33346372).

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

30121340 is a wasteful number, since it uses less digits than its factorization.

30121340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5077 (or 5075 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 14.

The square root of 30121340 is about 5488.2911730337. The cubic root of 30121340 is about 311.1416110499.

Adding to 30121340 its reverse (4312103), we get a palindrome (34433443).

The spelling of 30121340 in words is "thirty million, one hundred twenty-one thousand, three hundred forty".