420247872 has 112 divisors (see below), whose sum is σ = 1347825600. Its totient is φ = 127342080.

The previous prime is 420247853. The next prime is 420247879. The reversal of 420247872 is 278742024.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (420247879) 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 15 ways as a sum of consecutive naturals, for example, 7954 + ... + 30062.

Almost surely, 2^420247872 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 420247872, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (673912800).

420247872 is an abundant number, since it is smaller than the sum of its proper divisors (927577728).

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

420247872 is a wasteful number, since it uses less digits than its factorization.

420247872 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22141 (or 22125 counting only the distinct ones).

The product of its (nonzero) digits is 50176, while the sum is 36.

The square root of 420247872 is about 20499.9480974953. The cubic root of 420247872 is about 749.0345336997.

Adding to 420247872 its reverse (278742024), we get a palindrome (698989896).

The spelling of 420247872 in words is "four hundred twenty million, two hundred forty-seven thousand, eight hundred seventy-two".