30689438 has 16 divisors (see below), whose sum is σ = 50512896. Its totient is φ = 13896480.

The previous prime is 30689431. The next prime is 30689441. The reversal of 30689438 is 83498603.

It is a junction number, because it is equal to n+sod(n) for n = 30689395 and 30689404.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30689431) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9758 + ... + 12513.

It is an arithmetic number, because the mean of its divisors is an integer number (3157056).

Almost surely, 2^30689438 is an apocalyptic number.

30689438 is a deficient number, since it is larger than the sum of its proper divisors (19823458).

30689438 is a wasteful number, since it uses less digits than its factorization.

30689438 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22339.

The product of its (nonzero) digits is 124416, while the sum is 41.

The square root of 30689438 is about 5539.8048702098. The cubic root of 30689438 is about 313.0855172972.

The spelling of 30689438 in words is "thirty million, six hundred eighty-nine thousand, four hundred thirty-eight".