1403904 has 44 divisors (see below), whose sum is σ = 3750104. Its totient is φ = 466944.

The previous prime is 1403903. The next prime is 1403921. The reversal of 1403904 is 4093041.

It is a hoax number, since the sum of its digits (21) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (1403903) by changing a digit.

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 in 3 ways as a sum of consecutive naturals, for example, 2844 + ... + 3300.

2^1403904 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1403904, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1875052).

1403904 is an abundant number, since it is smaller than the sum of its proper divisors (2346200).

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

1403904 is an equidigital number, since it uses as much as digits as its factorization.

1403904 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 480 (or 462 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 21.

The square root of 1403904 is about 1184.8645492207. The cubic root of 1403904 is about 111.9727825020.

Adding to 1403904 its reverse (4093041), we get a palindrome (5496945).

The spelling of 1403904 in words is "one million, four hundred three thousand, nine hundred four".