30666388 has 6 divisors (see below), whose sum is σ = 53666186. Its totient is φ = 15333192.

The previous prime is 30666379. The next prime is 30666397. The reversal of 30666388 is 88366603.

It is an interprime number because it is at equal distance from previous prime (30666379) and next prime (30666397).

It can be written as a sum of positive squares in only one way, i.e., 30272004 + 394384 = 5502^2 + 628^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 30666388.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3833295 + ... + 3833302.

Almost surely, 2^30666388 is an apocalyptic number.

It is an amenable number.

30666388 is a deficient number, since it is larger than the sum of its proper divisors (22999798).

30666388 is a wasteful number, since it uses less digits than its factorization.

30666388 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7666601 (or 7666599 counting only the distinct ones).

The product of its (nonzero) digits is 124416, while the sum is 40.

The square root of 30666388 is about 5537.7240812449. The cubic root of 30666388 is about 313.0071143337.

The spelling of 30666388 in words is "thirty million, six hundred sixty-six thousand, three hundred eighty-eight".