615404 has 12 divisors (see below), whose sum is σ = 1085784. Its totient is φ = 305184.

The previous prime is 615403. The next prime is 615413. The reversal of 615404 is 404516.

It is a happy number.

It is a hoax number, since the sum of its digits (20) coincides with the sum of the digits of its distinct prime factors.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 615404.

It is not an unprimeable number, because it can be changed into a prime (615401) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14 + ... + 1109.

It is an arithmetic number, because the mean of its divisors is an integer number (90482).

2⁶¹⁵⁴⁰⁴ is an apocalyptic number.

It is an amenable number.

615404 is a deficient number, since it is larger than the sum of its proper divisors (470380).

615404 is a wasteful number, since it uses less digits than its factorization.

615404 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1264 (or 1262 counting only the distinct ones).

The product of its (nonzero) digits is 480, while the sum is 20.

The square root of 615404 is about 784.4768957720. The cubic root of 615404 is about 85.0589671570.

The spelling of 615404 in words is "six hundred fifteen thousand, four hundred four".