880405 has 4 divisors (see below), whose sum is σ = 1056492. Its totient is φ = 704320.

The previous prime is 880367. The next prime is 880409. The reversal of 880405 is 504088.

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

It can be written as a sum of positive squares in 2 ways, for example, as 603729 + 276676 = 777^2 + 526^2 .

It is a de Polignac number, because none of the positive numbers 2^k-880405 is a prime.

It is a super-2 number, since 2×880405² = 1550225928050, which contains 22 as substring.

It is a Duffinian number.

880405 is a lucky number.

It is a self number, because there is not a number n which added to its sum of digits gives 880405.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (880409) 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, 88036 + ... + 88045.

It is an arithmetic number, because the mean of its divisors is an integer number (264123).

2⁸⁸⁰⁴⁰⁵ is an apocalyptic number.

It is an amenable number.

880405 is a deficient number, since it is larger than the sum of its proper divisors (176087).

880405 is a wasteful number, since it uses less digits than its factorization.

880405 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 176086.

The product of its (nonzero) digits is 1280, while the sum is 25.

The square root of 880405 is about 938.2989928589. The cubic root of 880405 is about 95.8430958339.

The spelling of 880405 in words is "eight hundred eighty thousand, four hundred five".