30973638 has 16 divisors (see below), whose sum is σ = 62009136. Its totient is φ = 10314240.

The previous prime is 30973637. The next prime is 30973693. The reversal of 30973638 is 83637903.

It is a junction number, because it is equal to n+sod(n) for n = 30973596 and 30973605.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30973637) 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, 6270 + ... + 10062.

It is an arithmetic number, because the mean of its divisors is an integer number (3875571).

Almost surely, 2^30973638 is an apocalyptic number.

30973638 is an abundant number, since it is smaller than the sum of its proper divisors (31035498).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

30973638 is a wasteful number, since it uses less digits than its factorization.

30973638 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5159.

The product of its (nonzero) digits is 81648, while the sum is 39.

The square root of 30973638 is about 5565.3964818331. The cubic root of 30973638 is about 314.0489936668.

The spelling of 30973638 in words is "thirty million, nine hundred seventy-three thousand, six hundred thirty-eight".