420937280 has 56 divisors (see below), whose sum is σ = 1015105920. Its totient is φ = 166233600.

The previous prime is 420937273. The next prime is 420937303. The reversal of 420937280 is 82739024.

It is a self number, because there is not a number n which added to its sum of digits gives 420937280.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16955 + ... + 33605.

Almost surely, 2^420937280 is an apocalyptic number.

420937280 is a gapful number since it is divisible by the number (40) 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 420937280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (507552960).

420937280 is an abundant number, since it is smaller than the sum of its proper divisors (594168640).

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

420937280 is a wasteful number, since it uses less digits than its factorization.

420937280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16747 (or 16737 counting only the distinct ones).

The product of its (nonzero) digits is 24192, while the sum is 35.

The square root of 420937280 is about 20516.7560788737. The cubic root of 420937280 is about 749.4439018491.

The spelling of 420937280 in words is "four hundred twenty million, nine hundred thirty-seven thousand, two hundred eighty".