33807945 has 8 divisors (see below), whose sum is σ = 54092736. Its totient is φ = 18030896.

The previous prime is 33807931. The next prime is 33807947. The reversal of 33807945 is 54970833.

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

It is a cyclic number.

It is not a de Polignac number, because 33807945 - 2⁵ = 33807913 is a prime.

It is a super-2 number, since 2×33807945² = 2285954290246050, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (33807947) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1126917 + ... + 1126946.

It is an arithmetic number, because the mean of its divisors is an integer number (6761592).

Almost surely, 2^33807945 is an apocalyptic number.

It is an amenable number.

33807945 is a deficient number, since it is larger than the sum of its proper divisors (20284791).

33807945 is a wasteful number, since it uses less digits than its factorization.

33807945 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2253871.

The product of its (nonzero) digits is 90720, while the sum is 39.

The square root of 33807945 is about 5814.4599921231. The cubic root of 33807945 is about 323.3500440106.

It can be divided in two parts, 3380 and 7945, that added together give a triangular number (11325 = T₁₅₀).

The spelling of 33807945 in words is "thirty-three million, eight hundred seven thousand, nine hundred forty-five".