30045940 has 12 divisors (see below), whose sum is σ = 63096516. Its totient is φ = 12018368.

The previous prime is 30045931. The next prime is 30045941. The reversal of 30045940 is 4954003.

It can be written as a sum of positive squares in 2 ways, for example, as 6290064 + 23755876 = 2508^2 + 4874^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30045941) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 751129 + ... + 751168.

It is an arithmetic number, because the mean of its divisors is an integer number (5258043).

Almost surely, 2^30045940 is an apocalyptic number.

It is an amenable number.

30045940 is an abundant number, since it is smaller than the sum of its proper divisors (33050576).

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

30045940 is a wasteful number, since it uses less digits than its factorization.

30045940 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1502306 (or 1502304 counting only the distinct ones).

The product of its (nonzero) digits is 2160, while the sum is 25.

The square root of 30045940 is about 5481.4176998291. The cubic root of 30045940 is about 310.8817766612.

Adding to 30045940 its reverse (4954003), we get a palindrome (34999943).

The spelling of 30045940 in words is "thirty million, forty-five thousand, nine hundred forty".