30742224 has 20 divisors (see below), whose sum is σ = 79417536. Its totient is φ = 10247392.

The previous prime is 30742207. The next prime is 30742249. The reversal of 30742224 is 42224703.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a junction number, because it is equal to n+sod(n) for n = 30742194 and 30742203.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 320184 + ... + 320279.

Almost surely, 2^30742224 is an apocalyptic number.

It is an amenable number.

30742224 is an abundant number, since it is smaller than the sum of its proper divisors (48675312).

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

30742224 is a wasteful number, since it uses less digits than its factorization.

30742224 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 640474 (or 640468 counting only the distinct ones).

The product of its (nonzero) digits is 2688, while the sum is 24.

The square root of 30742224 is about 5544.5670705656. The cubic root of 30742224 is about 313.2649174100.

Adding to 30742224 its reverse (42224703), we get a palindrome (72966927).

The spelling of 30742224 in words is "thirty million, seven hundred forty-two thousand, two hundred twenty-four".