861886270 has 16 divisors (see below), whose sum is σ = 1773023328. Its totient is φ = 295503840.

The previous prime is 861886261. The next prime is 861886271. The reversal of 861886270 is 72688168.

It is a self number, because there is not a number n which added to its sum of digits gives 861886270.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (861886271) 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, 6156261 + ... + 6156400.

It is an arithmetic number, because the mean of its divisors is an integer number (110813958).

Almost surely, 2^861886270 is an apocalyptic number.

861886270 is an abundant number, since it is smaller than the sum of its proper divisors (911137058).

861886270 is a wasteful number, since it uses less digits than its factorization.

861886270 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12312675.

The product of its (nonzero) digits is 258048, while the sum is 46.

The square root of 861886270 is about 29357.8996183310. The cubic root of 861886270 is about 951.6632985030.

The spelling of 861886270 in words is "eight hundred sixty-one million, eight hundred eighty-six thousand, two hundred seventy".