65404 has 12 divisors (see below), whose sum is σ = 116424. Its totient is φ = 32144.

The previous prime is 65393. The next prime is 65407. The reversal of 65404 is 40456.

It is a plaindrome in base 6.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65407) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 234 + ... + 430.

It is an arithmetic number, because the mean of its divisors is an integer number (9702).

2⁶⁵⁴⁰⁴ is an apocalyptic number.

It is an amenable number.

65404 is a deficient number, since it is larger than the sum of its proper divisors (51020).

65404 is a wasteful number, since it uses less digits than its factorization.

65404 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 284 (or 282 counting only the distinct ones).

The product of its (nonzero) digits is 480, while the sum is 19.

The square root of 65404 is about 255.7420575502. The cubic root of 65404 is about 40.2903867865.

Multiplying 65404 by its sum of digits (19), we get a triangular number (1242676 = T₁₅₇₆).

The spelling of 65404 in words is "sixty-five thousand, four hundred four".