30809916 has 96 divisors (see below), whose sum is σ = 85942080. Its totient is φ = 9510912.

The previous prime is 30809897. The next prime is 30809923. The reversal of 30809916 is 61990803.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 178006 + ... + 178178.

It is an arithmetic number, because the mean of its divisors is an integer number (895230).

Almost surely, 2^30809916 is an apocalyptic number.

30809916 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 30809916, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (42971040).

30809916 is an abundant number, since it is smaller than the sum of its proper divisors (55132164).

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

30809916 is a wasteful number, since it uses less digits than its factorization.

30809916 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 300 (or 292 counting only the distinct ones).

The product of its (nonzero) digits is 11664, while the sum is 36.

The square root of 30809916 is about 5550.6680678996. The cubic root of 30809916 is about 313.4946772293.

It can be divided in two parts, 3080 and 9916, that added together give a square (12996 = 114²).

The spelling of 30809916 in words is "thirty million, eight hundred nine thousand, nine hundred sixteen".