33680385 has 12 divisors (see below), whose sum is σ = 58379412. Its totient is φ = 17962848.

The previous prime is 33680371. The next prime is 33680401. The reversal of 33680385 is 58308633.

It can be written as a sum of positive squares in 2 ways, for example, as 10870209 + 22810176 = 3297^2 + 4776^2 .

It is a de Polignac number, because none of the positive numbers 2^k-33680385 is a prime.

It is a super-2 number, since 2×33680385² = 2268736667496450, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 374182 + ... + 374271.

It is an arithmetic number, because the mean of its divisors is an integer number (4864951).

Almost surely, 2^33680385 is an apocalyptic number.

It is an amenable number.

33680385 is a deficient number, since it is larger than the sum of its proper divisors (24699027).

33680385 is a wasteful number, since it uses less digits than its factorization.

33680385 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 748464 (or 748461 counting only the distinct ones).

The product of its (nonzero) digits is 51840, while the sum is 36.

The square root of 33680385 is about 5803.4804212645. The cubic root of 33680385 is about 322.9428565277.

The spelling of 33680385 in words is "thirty-three million, six hundred eighty thousand, three hundred eighty-five".