30689405 has 8 divisors (see below), whose sum is σ = 37431384. Its totient is φ = 24148800.

The previous prime is 30689387. The next prime is 30689413. The reversal of 30689405 is 50498603.

It can be written as a sum of positive squares in 4 ways, for example, as 2184484 + 28504921 = 1478^2 + 5339^2 .

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

It is not a de Polignac number, because 30689405 - 2⁶ = 30689341 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 50006 + ... + 50615.

It is an arithmetic number, because the mean of its divisors is an integer number (4678923).

Almost surely, 2^30689405 is an apocalyptic number.

It is an amenable number.

30689405 is a deficient number, since it is larger than the sum of its proper divisors (6741979).

30689405 is a wasteful number, since it uses less digits than its factorization.

30689405 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 100687.

The product of its (nonzero) digits is 25920, while the sum is 35.

The square root of 30689405 is about 5539.8018917647. The cubic root of 30689405 is about 313.0854050781.

The spelling of 30689405 in words is "thirty million, six hundred eighty-nine thousand, four hundred five".