420307238 has 32 divisors (see below), whose sum is σ = 702815232. Its totient is φ = 187207200.

The previous prime is 420307231. The next prime is 420307247. The reversal of 420307238 is 832703024.

It is a self number, because there is not a number n which added to its sum of digits gives 420307238.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (420307231) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 517853 + ... + 518663.

It is an arithmetic number, because the mean of its divisors is an integer number (21962976).

Almost surely, 2^420307238 is an apocalyptic number.

420307238 is a deficient number, since it is larger than the sum of its proper divisors (282507994).

420307238 is a wasteful number, since it uses less digits than its factorization.

420307238 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1500.

The product of its (nonzero) digits is 8064, while the sum is 29.

The square root of 420307238 is about 20501.3960012483. The cubic root of 420307238 is about 749.0698026393.

The spelling of 420307238 in words is "four hundred twenty million, three hundred seven thousand, two hundred thirty-eight".