420127440 has 40 divisors (see below), whose sum is σ = 1302395808. Its totient is φ = 112033920.

The previous prime is 420127439. The next prime is 420127441. The reversal of 420127440 is 44721024.

It is an interprime number because it is at equal distance from previous prime (420127439) and next prime (420127441).

It is a tau number, because it is divible by the number of its divisors (40).

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a self number, because there is not a number n which added to its sum of digits gives 420127440.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (420127441) 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 7 ways as a sum of consecutive naturals, for example, 875026 + ... + 875505.

Almost surely, 2^420127440 is an apocalyptic number.

420127440 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

420127440 is an abundant number, since it is smaller than the sum of its proper divisors (882268368).

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

420127440 is a wasteful number, since it uses less digits than its factorization.

420127440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1750547 (or 1750541 counting only the distinct ones).

The product of its (nonzero) digits is 1792, while the sum is 24.

The square root of 420127440 is about 20497.0105137310. The cubic root of 420127440 is about 748.9629756571.

Adding to 420127440 its reverse (44721024), we get a palindrome (464848464).

The spelling of 420127440 in words is "four hundred twenty million, one hundred twenty-seven thousand, four hundred forty".