30863916 has 72 divisors (see below), whose sum is σ = 81913104. Its totient is φ = 10160640.

The previous prime is 30863909. The next prime is 30863929. The reversal of 30863916 is 61936803.

It is a happy number.

30863916 is a `hidden beast` number, since 3 + 0 + 8 + 639 + 16 = 666.

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

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, 109696 + ... + 109976.

It is an arithmetic number, because the mean of its divisors is an integer number (1137682).

Almost surely, 2^30863916 is an apocalyptic number.

30863916 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 30863916, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (40956552).

30863916 is an abundant number, since it is smaller than the sum of its proper divisors (51049188).

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

30863916 is a wasteful number, since it uses less digits than its factorization.

30863916 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 413 (or 399 counting only the distinct ones).

The product of its (nonzero) digits is 23328, while the sum is 36.

The square root of 30863916 is about 5555.5302177200. The cubic root of 30863916 is about 313.6777225403.

The spelling of 30863916 in words is "thirty million, eight hundred sixty-three thousand, nine hundred sixteen".