905648836 has 27 divisors (see below), whose sum is σ = 1628922477. Its totient is φ = 440576160.

The previous prime is 905648831. The next prime is 905648867. The reversal of 905648836 is 638846509.

It is a happy number.

The square root of 905648836 is 30094.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 43639236 + 862009600 = 6606^2 + 29360^2 .

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 905648836.

It is not an unprimeable number, because it can be changed into a prime (905648831) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 2467525 + ... + 2467891.

Almost surely, 2^905648836 is an apocalyptic number.

905648836 is the 30094-th square number.

It is an amenable number.

905648836 is a deficient number, since it is larger than the sum of its proper divisors (723273641).

905648836 is an equidigital number, since it uses as much as digits as its factorization.

905648836 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 820 (or 410 counting only the distinct ones).

The product of its (nonzero) digits is 1244160, while the sum is 49.

The cubic root of 905648836 is about 967.5051328997.

Multiplying 905648836 by its sum of digits (49), we get a square (44376792964 = 210658²).

The spelling of 905648836 in words is "nine hundred five million, six hundred forty-eight thousand, eight hundred thirty-six".