420238290 has 64 divisors (see below), whose sum is σ = 1057453056. Its totient is φ = 106679232.

The previous prime is 420238277. The next prime is 420238309. The reversal of 420238290 is 92832024.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 155289 + ... + 157971.

It is an arithmetic number, because the mean of its divisors is an integer number (16522704).

Almost surely, 2^420238290 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 420238290, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (528726528).

420238290 is an abundant number, since it is smaller than the sum of its proper divisors (637214766).

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

420238290 is a wasteful number, since it uses less digits than its factorization.

420238290 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2943.

The product of its (nonzero) digits is 6912, while the sum is 30.

The square root of 420238290 is about 20499.7143882543. The cubic root of 420238290 is about 749.0288407869.

The spelling of 420238290 in words is "four hundred twenty million, two hundred thirty-eight thousand, two hundred ninety".