407891 has 6 divisors (see below), whose sum is σ = 448476. Its totient is φ = 370700.

The previous prime is 407879. The next prime is 407893. The reversal of 407891 is 198704.

It is a de Polignac number, because none of the positive numbers 2^k-407891 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (407893) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1565 + ... + 1806.

It is an arithmetic number, because the mean of its divisors is an integer number (74746).

2⁴⁰⁷⁸⁹¹ is an apocalyptic number.

407891 is a deficient number, since it is larger than the sum of its proper divisors (40585).

407891 is a wasteful number, since it uses less digits than its factorization.

407891 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3393 (or 3382 counting only the distinct ones).

The product of its (nonzero) digits is 2016, while the sum is 29.

The square root of 407891 is about 638.6634481478. The cubic root of 407891 is about 74.1619899140.

The spelling of 407891 in words is "four hundred seven thousand, eight hundred ninety-one".