30043640 has 32 divisors (see below), whose sum is σ = 73744560. Its totient is φ = 10924800.

The previous prime is 30043613. The next prime is 30043679. The reversal of 30043640 is 4634003.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 33701 + ... + 34580.

Almost surely, 2^30043640 is an apocalyptic number.

It is an amenable number.

30043640 is an abundant number, since it is smaller than the sum of its proper divisors (43700920).

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

30043640 is a wasteful number, since it uses less digits than its factorization.

30043640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 68303 (or 68299 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 20.

The square root of 30043640 is about 5481.2078960755. The cubic root of 30043640 is about 310.8738438497.

Adding to 30043640 its reverse (4634003), we get a palindrome (34677643).

The spelling of 30043640 in words is "thirty million, forty-three thousand, six hundred forty".