861806148 has 24 divisors (see below), whose sum is σ = 2298149952. Its totient is φ = 246230304.

The previous prime is 861806131. The next prime is 861806149. The reversal of 861806148 is 841608168.

861806148 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 (42).

It is not an unprimeable number, because it can be changed into a prime (861806149) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5129715 + ... + 5129882.

It is an arithmetic number, because the mean of its divisors is an integer number (95756248).

Almost surely, 2^861806148 is an apocalyptic number.

It is an amenable number.

861806148 is an abundant number, since it is smaller than the sum of its proper divisors (1436343804).

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

861806148 is a wasteful number, since it uses less digits than its factorization.

861806148 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10259611 (or 10259609 counting only the distinct ones).

The product of its (nonzero) digits is 73728, while the sum is 42.

The square root of 861806148 is about 29356.5350135196. The cubic root of 861806148 is about 951.6338083285.

The spelling of 861806148 in words is "eight hundred sixty-one million, eight hundred six thousand, one hundred forty-eight".