30669399 has 12 divisors (see below), whose sum is σ = 44382000. Its totient is φ = 20408544.

The previous prime is 30669391. The next prime is 30669403. The reversal of 30669399 is 99396603.

It is not a de Polignac number, because 30669399 - 2³ = 30669391 is a prime.

It is a super-2 number, since 2×30669399² = 1881224070042402, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30669391) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2547 + ... + 8235.

It is an arithmetic number, because the mean of its divisors is an integer number (3698500).

Almost surely, 2^30669399 is an apocalyptic number.

30669399 is a deficient number, since it is larger than the sum of its proper divisors (13712601).

30669399 is a wasteful number, since it uses less digits than its factorization.

30669399 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6294 (or 6291 counting only the distinct ones).

The product of its (nonzero) digits is 236196, while the sum is 45.

The square root of 30669399 is about 5537.9959371599. The cubic root of 30669399 is about 313.0173582700.

Adding to 30669399 its sum of digits (45), we get a square (30669444 = 5538²).

The spelling of 30669399 in words is "thirty million, six hundred sixty-nine thousand, three hundred ninety-nine".