1613404 has 48 divisors (see below), whose sum is σ = 3386880. Its totient is φ = 665280.

The previous prime is 1613399. The next prime is 1613407. The reversal of 1613404 is 4043161.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (19).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1613407) 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 15 ways as a sum of consecutive naturals, for example, 22689 + ... + 22759.

It is an arithmetic number, because the mean of its divisors is an integer number (70560).

2^1613404 is an apocalyptic number.

It is an amenable number.

1613404 is an abundant number, since it is smaller than the sum of its proper divisors (1773476).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1613404 is a wasteful number, since it uses less digits than its factorization.

1613404 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 130 (or 128 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 19.

The square root of 1613404 is about 1270.1984096983. The cubic root of 1613404 is about 117.2864144650.

Adding to 1613404 its reverse (4043161), we get a palindrome (5656565).

The spelling of 1613404 in words is "one million, six hundred thirteen thousand, four hundred four".