1081311836 has 48 divisors (see below), whose sum is σ = 2087973888. Its totient is φ = 485913600.

The previous prime is 1081311817. The next prime is 1081311851. The reversal of 1081311836 is 6381131801.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1893431 + ... + 1894001.

It is an arithmetic number, because the mean of its divisors is an integer number (43499456).

Almost surely, 2^1081311836 is an apocalyptic number.

It is an amenable number.

1081311836 is a deficient number, since it is larger than the sum of its proper divisors (1006662052).

1081311836 is a wasteful number, since it uses less digits than its factorization.

1081311836 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1002 (or 1000 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 32.

The square root of 1081311836 is about 32883.3063422765. The cubic root of 1081311836 is about 1026.4008088155.

The spelling of 1081311836 in words is "one billion, eighty-one million, three hundred eleven thousand, eight hundred thirty-six".