30691285 has 8 divisors (see below), whose sum is σ = 37209816. Its totient is φ = 24299520.

The previous prime is 30691279. The next prime is 30691301. The reversal of 30691285 is 58219603.

It can be written as a sum of positive squares in 4 ways, for example, as 298116 + 30393169 = 546^2 + 5513^2 .

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

It is not a de Polignac number, because 30691285 - 2³ = 30691277 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 30691285.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 31156 + ... + 32125.

It is an arithmetic number, because the mean of its divisors is an integer number (4651227).

Almost surely, 2^30691285 is an apocalyptic number.

It is an amenable number.

30691285 is a deficient number, since it is larger than the sum of its proper divisors (6518531).

30691285 is an equidigital number, since it uses as much as digits as its factorization.

30691285 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 63383.

The product of its (nonzero) digits is 12960, while the sum is 34.

The square root of 30691285 is about 5539.9715703242. The cubic root of 30691285 is about 313.0917980395.

It can be divided in two parts, 30691 and 285, that added together give a square (30976 = 176²).

The spelling of 30691285 in words is "thirty million, six hundred ninety-one thousand, two hundred eighty-five".