30349236640 has 24 divisors (see below), whose sum is σ = 71700071940. Its totient is φ = 12139694592.

The previous prime is 30349236637. The next prime is 30349236641. The reversal of 30349236640 is 4663294303.

It can be written as a sum of positive squares in 2 ways, for example, as 25829632656 + 4519603984 = 160716^2 + 67228^2 .

It is a Harshad number since it is a multiple of its sum of digits (40).

It is a junction number, because it is equal to n+sod(n) for n = 30349236593 and 30349236602.

It is not an unprimeable number, because it can be changed into a prime (30349236641) 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, 94841205 + ... + 94841524.

Almost surely, 2^30349236640 is an apocalyptic number.

It is an amenable number.

30349236640 is an abundant number, since it is smaller than the sum of its proper divisors (41350835300).

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

30349236640 is a wasteful number, since it uses less digits than its factorization.

30349236640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 189682744 (or 189682736 counting only the distinct ones).

The product of its (nonzero) digits is 279936, while the sum is 40.

The spelling of 30349236640 in words is "thirty billion, three hundred forty-nine million, two hundred thirty-six thousand, six hundred forty".