30722432 has 64 divisors (see below), whose sum is σ = 67830000. Its totient is φ = 13768704.

The previous prime is 30722431. The next prime is 30722473. The reversal of 30722432 is 23422703.

It is a tau number, because it is divible by the number of its divisors (64).

It is a junction number, because it is equal to n+sod(n) for n = 30722398 and 30722407.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30722431) 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, 61319 + ... + 61817.

Almost surely, 2^30722432 is an apocalyptic number.

30722432 is a gapful number since it is divisible by the number (32) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 30722432, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (33915000).

30722432 is an abundant number, since it is smaller than the sum of its proper divisors (37107568).

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

30722432 is a wasteful number, since it uses less digits than its factorization.

30722432 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 563 (or 551 counting only the distinct ones).

The product of its (nonzero) digits is 2016, while the sum is 23.

The square root of 30722432 is about 5542.7819729807. The cubic root of 30722432 is about 313.1976757960.

The spelling of 30722432 in words is "thirty million, seven hundred twenty-two thousand, four hundred thirty-two".