30640332 has 24 divisors (see below), whose sum is σ = 71609776. Its totient is φ = 10196928.

The previous prime is 30640319. The next prime is 30640333. The reversal of 30640332 is 23304603.

It is a junction number, because it is equal to n+sod(n) for n = 30640299 and 30640308.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30640333) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7398 + ... + 10770.

Almost surely, 2^30640332 is an apocalyptic number.

It is an amenable number.

30640332 is an abundant number, since it is smaller than the sum of its proper divisors (40969444).

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

30640332 is a wasteful number, since it uses less digits than its factorization.

30640332 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4137 (or 4135 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 21.

The square root of 30640332 is about 5535.3709902770. The cubic root of 30640332 is about 312.9184393505.

Adding to 30640332 its reverse (23304603), we get a palindrome (53944935).

The spelling of 30640332 in words is "thirty million, six hundred forty thousand, three hundred thirty-two".