1404423020 has 384 divisors, whose sum is σ = 4267468800. Its totient is φ = 374169600.

The previous prime is 1404423001. The next prime is 1404423029. The reversal of 1404423020 is 203244041.

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 = 1404422983 and 1404423001.

It is not an unprimeable number, because it can be changed into a prime (1404423029) by changing a digit.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 23803751 + ... + 23803809.

It is an arithmetic number, because the mean of its divisors is an integer number (11113200).

Almost surely, 2^1404423020 is an apocalyptic number.

1404423020 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 1404423020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2133734400).

1404423020 is an abundant number, since it is smaller than the sum of its proper divisors (2863045780).

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

1404423020 is a wasteful number, since it uses less digits than its factorization.

1404423020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 169 (or 167 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 20.

The square root of 1404423020 is about 37475.6323495682. The cubic root of 1404423020 is about 1119.8657949313.

Adding to 1404423020 its reverse (203244041), we get a palindrome (1607667061).

It can be divided in two parts, 1404 and 423020, that added together give a palindrome (424424).

The spelling of 1404423020 in words is "one billion, four hundred four million, four hundred twenty-three thousand, twenty".