30440816 has 40 divisors (see below), whose sum is σ = 67805184. Its totient is φ = 12968640.

The previous prime is 30440803. The next prime is 30440843. The reversal of 30440816 is 61804403.

It is a super-3 number, since 3×30440816³ (a number of 23 digits) contains 333 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 20681 + ... + 22103.

Almost surely, 2^30440816 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 30440816, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (33902592).

30440816 is an abundant number, since it is smaller than the sum of its proper divisors (37364368).

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

30440816 is a wasteful number, since it uses less digits than its factorization.

30440816 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1629 (or 1623 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 26.

The square root of 30440816 is about 5517.3196391001. The cubic root of 30440816 is about 312.2377652870.

The spelling of 30440816 in words is "thirty million, four hundred forty thousand, eight hundred sixteen".