36891405 has 24 divisors (see below), whose sum is σ = 65676312. Its totient is φ = 19142784.

The previous prime is 36891403. The next prime is 36891409. The reversal of 36891405 is 50419863.

36891405 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 16990884 + 19900521 = 4122^2 + 4461^2 .

It is not a de Polignac number, because 36891405 - 2¹ = 36891403 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 36891405.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (36891401) by changing a digit.

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 23 ways as a sum of consecutive naturals, for example, 9414 + ... + 12743.

It is an arithmetic number, because the mean of its divisors is an integer number (2736513).

Almost surely, 2^36891405 is an apocalyptic number.

It is an amenable number.

36891405 is a deficient number, since it is larger than the sum of its proper divisors (28784907).

36891405 is a wasteful number, since it uses less digits than its factorization.

36891405 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22205 (or 22202 counting only the distinct ones).

The product of its (nonzero) digits is 25920, while the sum is 36.

The square root of 36891405 is about 6073.8295168699. The cubic root of 36891405 is about 332.8958633334.

The spelling of 36891405 in words is "thirty-six million, eight hundred ninety-one thousand, four hundred five".