420865308 has 36 divisors (see below), whose sum is σ = 1103258520. Its totient is φ = 140288112.

The previous prime is 420865303. The next prime is 420865321. The reversal of 420865308 is 803568024.

420865308 is a `hidden beast` number, since 42 + 0 + 86 + 530 + 8 = 666.

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (420865303) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 215523 + ... + 217466.

It is an arithmetic number, because the mean of its divisors is an integer number (30646070).

Almost surely, 2^420865308 is an apocalyptic number.

It is an amenable number.

420865308 is an abundant number, since it is smaller than the sum of its proper divisors (682393212).

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

420865308 is a wasteful number, since it uses less digits than its factorization.

420865308 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 433008 (or 432994 counting only the distinct ones).

The product of its (nonzero) digits is 46080, while the sum is 36.

The square root of 420865308 is about 20515.0020229100. The cubic root of 420865308 is about 749.4011860230.

The spelling of 420865308 in words is "four hundred twenty million, eight hundred sixty-five thousand, three hundred eight".