30090816 has 168 divisors, whose sum is σ = 104607360. Its totient is φ = 8073216.

The previous prime is 30090791. The next prime is 30090847. The reversal of 30090816 is 61809003.

It is a tau number, because it is divible by the number of its divisors (168).

It is a self number, because there is not a number n which added to its sum of digits gives 30090816.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 68325 + ... + 68763.

Almost surely, 2^30090816 is an apocalyptic number.

30090816 is a gapful number since it is divisible by the number (36) 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 30090816, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (52303680).

30090816 is an abundant number, since it is smaller than the sum of its proper divisors (74516544).

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

30090816 is a wasteful number, since it uses less digits than its factorization.

30090816 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 481 (or 468 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 27.

The square root of 30090816 is about 5485.5096390399. The cubic root of 30090816 is about 311.0364752179.

Adding to 30090816 its reverse (61809003), we get a palindrome (91899819).

The spelling of 30090816 in words is "thirty million, ninety thousand, eight hundred sixteen".