861136320 has 112 divisors (see below), whose sum is σ = 2982699648. Its totient is φ = 208757760.

The previous prime is 861136319. The next prime is 861136337. The reversal of 861136320 is 23631168.

861136320 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (30).

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, 30214 + ... + 51333.

Almost surely, 2^861136320 is an apocalyptic number.

861136320 is a gapful number since it is divisible by the number (80) formed by its first and last digit.

It is an amenable number.

861136320 is an abundant number, since it is smaller than the sum of its proper divisors (2121563328).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

861136320 is a wasteful number, since it uses less digits than its factorization.

861136320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 81578 (or 81568 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 30.

The square root of 861136320 is about 29345.1242968913. The cubic root of 861136320 is about 951.3871959519.

Adding to 861136320 its reverse (23631168), we get a palindrome (884767488).

The spelling of 861136320 in words is "eight hundred sixty-one million, one hundred thirty-six thousand, three hundred twenty".