1404212420 has 96 divisors (see below), whose sum is σ = 3269016576. Its totient is φ = 503424000.
The previous prime is 1404212387. The next prime is 1404212441. The reversal of 1404212420 is 242124041.
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 = 1404212392 and 1404212401.
It is an unprimeable number.
It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1844840 + ... + 1845600.
It is an arithmetic number, because the mean of its divisors is an integer number (34052256).
Almost surely, 21404212420 is an apocalyptic number.
1404212420 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 1404212420, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1634508288).
1404212420 is an abundant number, since it is smaller than the sum of its proper divisors (1864804156).
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
1404212420 is a wasteful number, since it uses less digits than its factorization.
1404212420 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 981 (or 979 counting only the distinct ones).
The product of its (nonzero) digits is 512, while the sum is 20.
The square root of 1404212420 is about 37472.8224183874. The cubic root of 1404212420 is about 1119.8098157088.
Adding to 1404212420 its reverse (242124041), we get a palindrome (1646336461).
It can be divided in two parts, 14042 and 12420, that added together give a palindrome (26462).
The spelling of 1404212420 in words is "one billion, four hundred four million, two hundred twelve thousand, four hundred twenty".
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