30040636 has 12 divisors (see below), whose sum is σ = 54384120. Its totient is φ = 14502320.

The previous prime is 30040631. The next prime is 30040639. The reversal of 30040636 is 63604003.

It is a super-2 number, since 2×30040636² = 1804879622568992, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30040631) 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, 129370 + ... + 129601.

It is an arithmetic number, because the mean of its divisors is an integer number (4532010).

Almost surely, 2^30040636 is an apocalyptic number.

It is an amenable number.

30040636 is a deficient number, since it is larger than the sum of its proper divisors (24343484).

30040636 is a wasteful number, since it uses less digits than its factorization.

30040636 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 259004 (or 259002 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 22.

The square root of 30040636 is about 5480.9338620348. The cubic root of 30040636 is about 310.8634822984.

Adding to 30040636 its reverse (63604003), we get a palindrome (93644639).

The spelling of 30040636 in words is "thirty million, forty thousand, six hundred thirty-six".