901636 has 12 divisors (see below), whose sum is σ = 1608012. Its totient is φ = 442208.

The previous prime is 901613. The next prime is 901643. The reversal of 901636 is 636109.

It can be written as a sum of positive squares in 2 ways, for example, as 348100 + 553536 = 590^2 + 744^2 .

It is an alternating number because its digits alternate between odd and even.

It is a self number, because there is not a number n which added to its sum of digits gives 901636.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 1915 + ... + 2338.

It is an arithmetic number, because the mean of its divisors is an integer number (134001).

2⁹⁰¹⁶³⁶ is an apocalyptic number.

It is an amenable number.

901636 is a deficient number, since it is larger than the sum of its proper divisors (706376).

901636 is a wasteful number, since it uses less digits than its factorization.

901636 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4310 (or 4308 counting only the distinct ones).

The product of its (nonzero) digits is 972, while the sum is 25.

The square root of 901636 is about 949.5451542712. The cubic root of 901636 is about 96.6074045537.

The spelling of 901636 in words is "nine hundred one thousand, six hundred thirty-six".