861157110 has 64 divisors (see below), whose sum is σ = 2257818624. Its totient is φ = 208473600.

The previous prime is 861157109. The next prime is 861157127. The reversal of 861157110 is 11751168.

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

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 321075 + ... + 323745.

It is an arithmetic number, because the mean of its divisors is an integer number (35278416).

Almost surely, 2^861157110 is an apocalyptic number.

861157110 is an abundant number, since it is smaller than the sum of its proper divisors (1396661514).

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

861157110 is a wasteful number, since it uses less digits than its factorization.

861157110 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3669.

The product of its (nonzero) digits is 1680, while the sum is 30.

The square root of 861157110 is about 29345.4785273643. The cubic root of 861157110 is about 951.3948521847.

The spelling of 861157110 in words is "eight hundred sixty-one million, one hundred fifty-seven thousand, one hundred ten".