30986738 has 16 divisors (see below), whose sum is σ = 47160960. Its totient is φ = 15268176.

The previous prime is 30986737. The next prime is 30986759. The reversal of 30986738 is 83768903.

It is not an unprimeable number, because it can be changed into a prime (30986731) 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, 66695 + ... + 67157.

It is an arithmetic number, because the mean of its divisors is an integer number (2947560).

Almost surely, 2^30986738 is an apocalyptic number.

30986738 is a deficient number, since it is larger than the sum of its proper divisors (16174222).

30986738 is a wasteful number, since it uses less digits than its factorization.

30986738 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 881.

The product of its (nonzero) digits is 217728, while the sum is 44.

The square root of 30986738 is about 5566.5732726696. The cubic root of 30986738 is about 314.0932620858.

The spelling of 30986738 in words is "thirty million, nine hundred eighty-six thousand, seven hundred thirty-eight".