1404864 has 70 divisors (see below), whose sum is σ = 4179824. Its totient is φ = 466560.

The previous prime is 1404859. The next prime is 1404869. The reversal of 1404864 is 4684041.

It is an interprime number because it is at equal distance from previous prime (1404859) and next prime (1404869).

It is a Harshad number since it is a multiple of its sum of digits (27).

It is an Ulam number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1404869) 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 9 ways as a sum of consecutive naturals, for example, 5049 + ... + 5319.

2^1404864 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 1404864, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2089912).

1404864 is an abundant number, since it is smaller than the sum of its proper divisors (2774960).

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

1404864 is an equidigital number, since it uses as much as digits as its factorization.

1404864 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 295 (or 276 counting only the distinct ones).

The product of its (nonzero) digits is 3072, while the sum is 27.

The square root of 1404864 is about 1185.2695895871. The cubic root of 1404864 is about 111.9982992939.

The spelling of 1404864 in words is "one million, four hundred four thousand, eight hundred sixty-four".