30072520 has 16 divisors (see below), whose sum is σ = 67663260. Its totient is φ = 12028992.

The previous prime is 30072517. The next prime is 30072529. The reversal of 30072520 is 2527003.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 29877156 + 195364 = 5466^2 + 442^2 .

It is not an unprimeable number, because it can be changed into a prime (30072529) 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, 375867 + ... + 375946.

Almost surely, 2^30072520 is an apocalyptic number.

It is an amenable number.

30072520 is an abundant number, since it is smaller than the sum of its proper divisors (37590740).

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

30072520 is a wasteful number, since it uses less digits than its factorization.

30072520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 751824 (or 751820 counting only the distinct ones).

The product of its (nonzero) digits is 420, while the sum is 19.

The square root of 30072520 is about 5483.8417190871. The cubic root of 30072520 is about 310.9734230105.

Adding to 30072520 its reverse (2527003), we get a palindrome (32599523).

The spelling of 30072520 in words is "thirty million, seventy-two thousand, five hundred twenty".