420663508 has 24 divisors (see below), whose sum is σ = 757241352. Its totient is φ = 204326784.

The previous prime is 420663499. The next prime is 420663527. The reversal of 420663508 is 805366024.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 101969604 + 318693904 = 10098^2 + 17852^2 .

It is a congruent number.

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, 112566 + ... + 116242.

It is an arithmetic number, because the mean of its divisors is an integer number (31551723).

Almost surely, 2^420663508 is an apocalyptic number.

It is an amenable number.

420663508 is a deficient number, since it is larger than the sum of its proper divisors (336577844).

420663508 is a wasteful number, since it uses less digits than its factorization.

420663508 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4491 (or 4489 counting only the distinct ones).

The product of its (nonzero) digits is 34560, while the sum is 34.

The square root of 420663508 is about 20510.0830812554. The cubic root of 420663508 is about 749.2813905019.

The spelling of 420663508 in words is "four hundred twenty million, six hundred sixty-three thousand, five hundred eight".