30748432 has 80 divisors (see below), whose sum is σ = 71245440. Its totient is φ = 12672000.

The previous prime is 30748423. The next prime is 30748433. The reversal of 30748432 is 23484703.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 30748394 and 30748403.

It is not an unprimeable number, because it can be changed into a prime (30748433) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 203557 + ... + 203707.

It is an arithmetic number, because the mean of its divisors is an integer number (890568).

Almost surely, 2^30748432 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 30748432, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (35622720).

30748432 is an abundant number, since it is smaller than the sum of its proper divisors (40497008).

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

30748432 is a wasteful number, since it uses less digits than its factorization.

30748432 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 272 (or 266 counting only the distinct ones).

The product of its (nonzero) digits is 16128, while the sum is 31.

The square root of 30748432 is about 5545.1268696036. The cubic root of 30748432 is about 313.2860026089.

The spelling of 30748432 in words is "thirty million, seven hundred forty-eight thousand, four hundred thirty-two".