30545140 has 24 divisors (see below), whose sum is σ = 65198952. Its totient is φ = 12017280.

The previous prime is 30545117. The next prime is 30545147. The reversal of 30545140 is 4154503.

It can be written as a sum of positive squares in 4 ways, for example, as 8464 + 30536676 = 92^2 + 5526^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30545147) 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, 11299 + ... + 13738.

It is an arithmetic number, because the mean of its divisors is an integer number (2716623).

Almost surely, 2^30545140 is an apocalyptic number.

It is an amenable number.

30545140 is an abundant number, since it is smaller than the sum of its proper divisors (34653812).

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

30545140 is a wasteful number, since it uses less digits than its factorization.

30545140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25107 (or 25105 counting only the distinct ones).

The product of its (nonzero) digits is 1200, while the sum is 22.

The square root of 30545140 is about 5526.7657811780. The cubic root of 30545140 is about 312.5940495588.

Adding to 30545140 its reverse (4154503), we get a palindrome (34699643).

The spelling of 30545140 in words is "thirty million, five hundred forty-five thousand, one hundred forty".