33894405 has 24 divisors (see below), whose sum is σ = 60341112. Its totient is φ = 17587584.

The previous prime is 33894403. The next prime is 33894409. The reversal of 33894405 is 50449833.

It can be written as a sum of positive squares in 4 ways, for example, as 10536516 + 23357889 = 3246^2 + 4833^2 .

It is not a de Polignac number, because 33894405 - 2¹ = 33894403 is a prime.

It is a super-2 number, since 2×33894405² = 2297661380608050, which contains 22 as substring.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 33894405.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (33894403) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 8514 + ... + 11843.

It is an arithmetic number, because the mean of its divisors is an integer number (2514213).

Almost surely, 2^33894405 is an apocalyptic number.

It is an amenable number.

33894405 is a deficient number, since it is larger than the sum of its proper divisors (26446707).

33894405 is a wasteful number, since it uses less digits than its factorization.

33894405 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20405 (or 20402 counting only the distinct ones).

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

The square root of 33894405 is about 5821.8901569851. The cubic root of 33894405 is about 323.6254531041.

The spelling of 33894405 in words is "thirty-three million, eight hundred ninety-four thousand, four hundred five".