30749686 has 16 divisors (see below), whose sum is σ = 52053840. Its totient is φ = 13494880.

The previous prime is 30749683. The next prime is 30749729. The reversal of 30749686 is 68694703.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30749681) 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, 23461 + ... + 24736.

It is an arithmetic number, because the mean of its divisors is an integer number (3253365).

Almost surely, 2^30749686 is an apocalyptic number.

30749686 is a deficient number, since it is larger than the sum of its proper divisors (21304154).

30749686 is a wasteful number, since it uses less digits than its factorization.

30749686 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48239.

The product of its (nonzero) digits is 217728, while the sum is 43.

The square root of 30749686 is about 5545.2399407059. The cubic root of 30749686 is about 313.2902614201.

The spelling of 30749686 in words is "thirty million, seven hundred forty-nine thousand, six hundred eighty-six".