427904 has 16 divisors (see below), whose sum is σ = 852720. Its totient is φ = 213888.

The previous prime is 427883. The next prime is 427913. The reversal of 427904 is 409724.

It is a tau number, because it is divible by the number of its divisors (16).

It is an Ulam number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1544 + ... + 1799.

It is an arithmetic number, because the mean of its divisors is an integer number (53295).

2⁴²⁷⁹⁰⁴ is an apocalyptic number.

It is an amenable number.

427904 is a deficient number, since it is larger than the sum of its proper divisors (424816).

427904 is an equidigital number, since it uses as much as digits as its factorization.

427904 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3357 (or 3345 counting only the distinct ones).

The product of its (nonzero) digits is 2016, while the sum is 26.

The square root of 427904 is about 654.1437150963. The cubic root of 427904 is about 75.3555855288.

It can be divided in two parts, 427 and 904, that added together give a palindrome (1331).

The spelling of 427904 in words is "four hundred twenty-seven thousand, nine hundred four".