406871887 has 4 divisors (see below), whose sum is σ = 410674536. Its totient is φ = 403069240.

The previous prime is 406871879. The next prime is 406871929. The reversal of 406871887 is 788178604.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 406871887 - 2³ = 406871879 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 406871887.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (406871837) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1901164 + ... + 1901377.

It is an arithmetic number, because the mean of its divisors is an integer number (102668634).

Almost surely, 2^406871887 is an apocalyptic number.

406871887 is a deficient number, since it is larger than the sum of its proper divisors (3802649).

406871887 is a wasteful number, since it uses less digits than its factorization.

406871887 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3802648.

The product of its (nonzero) digits is 602112, while the sum is 49.

The square root of 406871887 is about 20171.0655891056. The cubic root of 406871887 is about 741.0017398728.

The spelling of 406871887 in words is "four hundred six million, eight hundred seventy-one thousand, eight hundred eighty-seven".