420297508 has 12 divisors (see below), whose sum is σ = 743104012. Its totient is φ = 207982080.

The previous prime is 420297491. The next prime is 420297509. The reversal of 420297508 is 805792024.

It can be written as a sum of positive squares in 2 ways, for example, as 156300004 + 263997504 = 12502^2 + 16248^2 .

It is a hoax number, since the sum of its digits (37) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (420297509) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 541233 + ... + 542008.

Almost surely, 2^420297508 is an apocalyptic number.

It is an amenable number.

420297508 is a deficient number, since it is larger than the sum of its proper divisors (322806504).

420297508 is a wasteful number, since it uses less digits than its factorization.

420297508 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1083342 (or 1083340 counting only the distinct ones).

The product of its (nonzero) digits is 40320, while the sum is 37.

The square root of 420297508 is about 20501.1586989614. The cubic root of 420297508 is about 749.0640223396.

The spelling of 420297508 in words is "four hundred twenty million, two hundred ninety-seven thousand, five hundred eight".