30440440 has 32 divisors (see below), whose sum is σ = 68856480. Its totient is φ = 12111232.

The previous prime is 30440437. The next prime is 30440479. The reversal of 30440440 is 4404403.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5949 + ... + 9811.

It is an arithmetic number, because the mean of its divisors is an integer number (2151765).

Almost surely, 2^30440440 is an apocalyptic number.

It is an amenable number.

30440440 is an abundant number, since it is smaller than the sum of its proper divisors (38416040).

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

30440440 is a wasteful number, since it uses less digits than its factorization.

30440440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4071 (or 4067 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 19.

The square root of 30440440 is about 5517.2855644782. The cubic root of 30440440 is about 312.2364797117.

Adding to 30440440 its reverse (4404403), we get a palindrome (34844843).

The spelling of 30440440 in words is "thirty million, four hundred forty thousand, four hundred forty".