1404920 has 64 divisors (see below), whose sum is σ = 3594240. Its totient is φ = 489600.

The previous prime is 1404919. The next prime is 1404937. The reversal of 1404920 is 294041.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 1404892 and 1404901.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 13589 + ... + 13691.

It is an arithmetic number, because the mean of its divisors is an integer number (56160).

2^1404920 is an apocalyptic number.

1404920 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1404920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1797120).

1404920 is an abundant number, since it is smaller than the sum of its proper divisors (2189320).

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

1404920 is a wasteful number, since it uses less digits than its factorization.

1404920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 156 (or 152 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 20.

The square root of 1404920 is about 1185.2932126693. The cubic root of 1404920 is about 111.9997874146. Note that the first 3 decimals are identical.

Adding to 1404920 its reverse (294041), we get a palindrome (1698961).

The spelling of 1404920 in words is "one million, four hundred four thousand, nine hundred twenty".