30381696 has 128 divisors (see below), whose sum is σ = 91800000. Its totient is φ = 9888768.

The previous prime is 30381649. The next prime is 30381707. The reversal of 30381696 is 69618303.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (128).

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

It is an alternating number because its digits alternate between odd and even.

It is a self number, because there is not a number n which added to its sum of digits gives 30381696.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 203830 + ... + 203978.

Almost surely, 2^30381696 is an apocalyptic number.

30381696 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 30381696, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (45900000).

30381696 is an abundant number, since it is smaller than the sum of its proper divisors (61418304).

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

30381696 is a wasteful number, since it uses less digits than its factorization.

30381696 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 231 (or 213 counting only the distinct ones).

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

The square root of 30381696 is about 5511.9593612435. The cubic root of 30381696 is about 312.0354989194.

Adding to 30381696 its reverse (69618303), we get a palindrome (99999999).

The spelling of 30381696 in words is "thirty million, three hundred eighty-one thousand, six hundred ninety-six".