421618860 has 72 divisors (see below), whose sum is σ = 1377295920. Its totient is φ = 103782528.

The previous prime is 421618837. The next prime is 421618871. The reversal of 421618860 is 68816124.

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

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 87750 + ... + 92429.

It is an arithmetic number, because the mean of its divisors is an integer number (19129110).

Almost surely, 2^421618860 is an apocalyptic number.

It is an amenable number.

421618860 is an abundant number, since it is smaller than the sum of its proper divisors (955677060).

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

421618860 is a wasteful number, since it uses less digits than its factorization.

421618860 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 180207 (or 180202 counting only the distinct ones).

The product of its (nonzero) digits is 18432, while the sum is 36.

The square root of 421618860 is about 20533.3596861303. The cubic root of 421618860 is about 749.8481826040.

The spelling of 421618860 in words is "four hundred twenty-one million, six hundred eighteen thousand, eight hundred sixty".