861488471 has 8 divisors (see below), whose sum is σ = 895198080. Its totient is φ = 828045792.

The previous prime is 861488461. The next prime is 861488473. The reversal of 861488471 is 174884168.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 861488471 - 2¹⁰ = 861487447 is a prime.

It is a super-3 number, since 3×861488471³ (a number of 28 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (861488473) 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, 60140 + ... + 73073.

It is an arithmetic number, because the mean of its divisors is an integer number (111899760).

Almost surely, 2^861488471 is an apocalyptic number.

861488471 is a deficient number, since it is larger than the sum of its proper divisors (33709609).

861488471 is a wasteful number, since it uses less digits than its factorization.

861488471 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 133465.

The product of its digits is 344064, while the sum is 47.

The square root of 861488471 is about 29351.1238456043. The cubic root of 861488471 is about 951.5168642696.

The spelling of 861488471 in words is "eight hundred sixty-one million, four hundred eighty-eight thousand, four hundred seventy-one".