30070620 has 144 divisors (see below), whose sum is σ = 100009728. Its totient is φ = 7280640.

The previous prime is 30070613. The next prime is 30070627. The reversal of 30070620 is 2607003.

It is an interprime number because it is at equal distance from previous prime (30070613) and next prime (30070627).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 30070593 and 30070602.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30070627) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 94702 + ... + 95018.

It is an arithmetic number, because the mean of its divisors is an integer number (694512).

Almost surely, 2^30070620 is an apocalyptic number.

30070620 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 30070620, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (50004864).

30070620 is an abundant number, since it is smaller than the sum of its proper divisors (69939108).

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

30070620 is a wasteful number, since it uses less digits than its factorization.

30070620 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 380 (or 375 counting only the distinct ones).

The product of its (nonzero) digits is 252, while the sum is 18.

The square root of 30070620 is about 5483.6684801326. The cubic root of 30070620 is about 310.9668737096.

Adding to 30070620 its reverse (2607003), we get a palindrome (32677623).

The spelling of 30070620 in words is "thirty million, seventy thousand, six hundred twenty".