30540072 has 32 divisors (see below), whose sum is σ = 76557600. Its totient is φ = 10152384.

The previous prime is 30540017. The next prime is 30540079. The reversal of 30540072 is 27004503.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (30540079) 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, 8538 + ... + 11574.

It is an arithmetic number, because the mean of its divisors is an integer number (2392425).

Almost surely, 2^30540072 is an apocalyptic number.

It is an amenable number.

30540072 is an abundant number, since it is smaller than the sum of its proper divisors (46017528).

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

30540072 is a wasteful number, since it uses less digits than its factorization.

30540072 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3465 (or 3461 counting only the distinct ones).

The product of its (nonzero) digits is 840, while the sum is 21.

The square root of 30540072 is about 5526.3072661588. The cubic root of 30540072 is about 312.5767602370.

Adding to 30540072 its reverse (27004503), we get a palindrome (57544575).

The spelling of 30540072 in words is "thirty million, five hundred forty thousand, seventy-two".