30072020 has 24 divisors (see below), whose sum is σ = 68892768. Its totient is φ = 10935200.

The previous prime is 30072013. The next prime is 30072023. The reversal of 30072020 is 2027003.

30072020 = 9² + 10² + ... + 448².

It is a junction number, because it is equal to n+sod(n) for n = 30071986 and 30072004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30072023) 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, 68126 + ... + 68565.

It is an arithmetic number, because the mean of its divisors is an integer number (2870532).

Almost surely, 2^30072020 is an apocalyptic number.

It is an amenable number.

30072020 is an abundant number, since it is smaller than the sum of its proper divisors (38820748).

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

30072020 is a wasteful number, since it uses less digits than its factorization.

30072020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 136711 (or 136709 counting only the distinct ones).

The product of its (nonzero) digits is 84, while the sum is 14.

The square root of 30072020 is about 5483.7961304191. The cubic root of 30072020 is about 310.9716995370.

Adding to 30072020 its reverse (2027003), we get a palindrome (32099023).

The spelling of 30072020 in words is "thirty million, seventy-two thousand, twenty".