30691746 has 12 divisors (see below), whose sum is σ = 66498822. Its totient is φ = 10230576.

The previous prime is 30691733. The next prime is 30691747. The reversal of 30691746 is 64719603.

It can be written as a sum of positive squares in only one way, i.e., 19900521 + 10791225 = 4461^2 + 3285^2 .

It is a super-3 number, since 3×30691746³ (a number of 23 digits) contains 333 as substring.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 30691746.

It is not an unprimeable number, because it can be changed into a prime (30691747) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 852531 + ... + 852566.

Almost surely, 2^30691746 is an apocalyptic number.

30691746 is an abundant number, since it is smaller than the sum of its proper divisors (35807076).

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

30691746 is a wasteful number, since it uses less digits than its factorization.

30691746 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1705105 (or 1705102 counting only the distinct ones).

The product of its (nonzero) digits is 27216, while the sum is 36.

The square root of 30691746 is about 5540.0131768796. The cubic root of 30691746 is about 313.0933656354.

The spelling of 30691746 in words is "thirty million, six hundred ninety-one thousand, seven hundred forty-six".