30688632 has 80 divisors (see below), whose sum is σ = 92594040. Its totient is φ = 9440064.

The previous prime is 30688631. The next prime is 30688639. The reversal of 30688632 is 23688603.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30688631) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 6603 + ... + 10245.

Almost surely, 2^30688632 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 30688632, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (46297020).

30688632 is an abundant number, since it is smaller than the sum of its proper divisors (61905408).

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

30688632 is a wasteful number, since it uses less digits than its factorization.

30688632 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3674 (or 3661 counting only the distinct ones).

The product of its (nonzero) digits is 41472, while the sum is 36.

The square root of 30688632 is about 5539.7321234876. The cubic root of 30688632 is about 313.0827764071.

The spelling of 30688632 in words is "thirty million, six hundred eighty-eight thousand, six hundred thirty-two".