405872 has 10 divisors (see below), whose sum is σ = 786408. Its totient is φ = 202928.

The previous prime is 405871. The next prime is 405893. The reversal of 405872 is 278504.

It is an Ulam number.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 405872.

It is not an unprimeable number, because it can be changed into a prime (405871) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12668 + ... + 12699.

2⁴⁰⁵⁸⁷² is an apocalyptic number.

It is an amenable number.

405872 is a deficient number, since it is larger than the sum of its proper divisors (380536).

405872 is a wasteful number, since it uses less digits than its factorization.

405872 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25375 (or 25369 counting only the distinct ones).

The product of its (nonzero) digits is 2240, while the sum is 26.

The square root of 405872 is about 637.0808425938. The cubic root of 405872 is about 74.0394238433.

The spelling of 405872 in words is "four hundred five thousand, eight hundred seventy-two".