30070040 has 128 divisors (see below), whose sum is σ = 90961920. Its totient is φ = 8640000.

The previous prime is 30070021. The next prime is 30070043. The reversal of 30070040 is 4007003.

It is a Harshad number since it is a multiple of its sum of digits (14).

It is a junction number, because it is equal to n+sod(n) for n = 30069997 and 30070024.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30070043) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 39665 + ... + 40415.

It is an arithmetic number, because the mean of its divisors is an integer number (710640).

Almost surely, 2^30070040 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 30070040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (45480960).

30070040 is an abundant number, since it is smaller than the sum of its proper divisors (60891880).

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

30070040 is a wasteful number, since it uses less digits than its factorization.

30070040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 793 (or 789 counting only the distinct ones).

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

The square root of 30070040 is about 5483.6155955720. The cubic root of 30070040 is about 310.9648743944.

Adding to 30070040 its reverse (4007003), we get a palindrome (34077043).

The spelling of 30070040 in words is "thirty million, seventy thousand, forty".