30985790 has 32 divisors (see below), whose sum is σ = 61469280. Its totient is φ = 11152000.

The previous prime is 30985783. The next prime is 30985793. The reversal of 30985790 is 9758903.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30985793) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9716 + ... + 12504.

It is an arithmetic number, because the mean of its divisors is an integer number (1920915).

Almost surely, 2^30985790 is an apocalyptic number.

30985790 is a deficient number, since it is larger than the sum of its proper divisors (30483490).

30985790 is a wasteful number, since it uses less digits than its factorization.

30985790 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2908.

The product of its (nonzero) digits is 68040, while the sum is 41.

The square root of 30985790 is about 5566.4881208891. The cubic root of 30985790 is about 314.0900589580.

It can be divided in two parts, 3098 and 5790, that added together give a palindrome (8888).

The spelling of 30985790 in words is "thirty million, nine hundred eighty-five thousand, seven hundred ninety".