420302250 has 128 divisors (see below), whose sum is σ = 1183403520. Its totient is φ = 110376000.

The previous prime is 420302231. The next prime is 420302263. The reversal of 420302250 is 52203024.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 478812 + ... + 479688.

It is an arithmetic number, because the mean of its divisors is an integer number (9245340).

Almost surely, 2^420302250 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 420302250, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (591701760).

420302250 is an abundant number, since it is smaller than the sum of its proper divisors (763101270).

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

420302250 is a wasteful number, since it uses less digits than its factorization.

420302250 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 974 (or 958 counting only the distinct ones).

The product of its (nonzero) digits is 480, while the sum is 18.

The square root of 420302250 is about 20501.2743506349. The cubic root of 420302250 is about 749.0668394300.

Adding to 420302250 its reverse (52203024), we get a palindrome (472505274).

The spelling of 420302250 in words is "four hundred twenty million, three hundred two thousand, two hundred fifty".