420037820 has 24 divisors (see below), whose sum is σ = 887014800. Its totient is φ = 167075072.

The previous prime is 420037781. The next prime is 420037823. The reversal of 420037820 is 28730024.

It is a self number, because there is not a number n which added to its sum of digits gives 420037820.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (420037823) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 55085 + ... + 62244.

It is an arithmetic number, because the mean of its divisors is an integer number (36958950).

Almost surely, 2^420037820 is an apocalyptic number.

It is an amenable number.

420037820 is an abundant number, since it is smaller than the sum of its proper divisors (466976980).

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

420037820 is a wasteful number, since it uses less digits than its factorization.

420037820 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 117517 (or 117515 counting only the distinct ones).

The product of its (nonzero) digits is 2688, while the sum is 26.

The square root of 420037820 is about 20494.8242246671. The cubic root of 420037820 is about 748.9097165514.

Adding to 420037820 its reverse (28730024), we get a palindrome (448767844).

The spelling of 420037820 in words is "four hundred twenty million, thirty-seven thousand, eight hundred twenty".