420684140 has 24 divisors (see below), whose sum is σ = 886708032. Its totient is φ = 167650560.

The previous prime is 420684139. The next prime is 420684151. The reversal of 420684140 is 41486024.

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, 33389 + ... + 44228.

It is an arithmetic number, because the mean of its divisors is an integer number (36946168).

Almost surely, 2^420684140 is an apocalyptic number.

It is an amenable number.

420684140 is an abundant number, since it is smaller than the sum of its proper divisors (466023892).

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

420684140 is a wasteful number, since it uses less digits than its factorization.

420684140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 77897 (or 77895 counting only the distinct ones).

The product of its (nonzero) digits is 6144, while the sum is 29.

The square root of 420684140 is about 20510.5860472099. The cubic root of 420684140 is about 749.2936401350.

The spelling of 420684140 in words is "four hundred twenty million, six hundred eighty-four thousand, one hundred forty".