36991405 has 16 divisors (see below), whose sum is σ = 51274944. Its totient is φ = 25319680.

The previous prime is 36991399. The next prime is 36991421. The reversal of 36991405 is 50419963.

36991405 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 36991405 - 2⁵ = 36991373 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 18847 + ... + 20716.

It is an arithmetic number, because the mean of its divisors is an integer number (3204684).

Almost surely, 2^36991405 is an apocalyptic number.

It is an amenable number.

36991405 is a deficient number, since it is larger than the sum of its proper divisors (14283539).

36991405 is a wasteful number, since it uses less digits than its factorization.

36991405 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39596.

The product of its (nonzero) digits is 29160, while the sum is 37.

The square root of 36991405 is about 6082.0559846157. The cubic root of 36991405 is about 333.1963809621.

The spelling of 36991405 in words is "thirty-six million, nine hundred ninety-one thousand, four hundred five".