30481668 has 144 divisors (see below), whose sum is σ = 94174080. Its totient is φ = 8128512.

The previous prime is 30481657. The next prime is 30481679. The reversal of 30481668 is 86618403.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (30481657) and next prime (30481679).

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 47 ways as a sum of consecutive naturals, for example, 314196 + ... + 314292.

Almost surely, 2^30481668 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 30481668, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (47087040).

30481668 is an abundant number, since it is smaller than the sum of its proper divisors (63692412).

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

30481668 is a wasteful number, since it uses less digits than its factorization.

30481668 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 186 (or 181 counting only the distinct ones).

The product of its (nonzero) digits is 27648, while the sum is 36.

The square root of 30481668 is about 5521.0205578317. The cubic root of 30481668 is about 312.3773786645.

The spelling of 30481668 in words is "thirty million, four hundred eighty-one thousand, six hundred sixty-eight".