420685240 has 32 divisors (see below), whose sum is σ = 947126880. Its totient is φ = 168170112.

The previous prime is 420685231. The next prime is 420685241. The reversal of 420685240 is 42586024.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (420685241) 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 7 ways as a sum of consecutive naturals, for example, 119749 + ... + 123211.

It is an arithmetic number, because the mean of its divisors is an integer number (29597715).

Almost surely, 2^420685240 is an apocalyptic number.

420685240 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

420685240 is an abundant number, since it is smaller than the sum of its proper divisors (526441640).

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

420685240 is a wasteful number, since it uses less digits than its factorization.

420685240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6511 (or 6507 counting only the distinct ones).

The product of its (nonzero) digits is 15360, while the sum is 31.

The square root of 420685240 is about 20510.6128626133. The cubic root of 420685240 is about 749.2942932159.

The spelling of 420685240 in words is "four hundred twenty million, six hundred eighty-five thousand, two hundred forty".