30981626 has 8 divisors (see below), whose sum is σ = 50047284. Its totient is φ = 14299200.

The previous prime is 30981611. The next prime is 30981637. The reversal of 30981626 is 62618903.

It can be written as a sum of positive squares in 2 ways, for example, as 29539225 + 1442401 = 5435^2 + 1201^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×30981626² = 1919722299207752, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 595775 + ... + 595826.

Almost surely, 2^30981626 is an apocalyptic number.

30981626 is a deficient number, since it is larger than the sum of its proper divisors (19065658).

30981626 is a wasteful number, since it uses less digits than its factorization.

30981626 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1191616.

The product of its (nonzero) digits is 15552, while the sum is 35.

The square root of 30981626 is about 5566.1140843501. The cubic root of 30981626 is about 314.0759887493.

The spelling of 30981626 in words is "thirty million, nine hundred eighty-one thousand, six hundred twenty-six".