421041386628 has 18 divisors (see below), whose sum is σ = 1064299060734. Its totient is φ = 140347128864.

The previous prime is 421041386621. The next prime is 421041386713. The reversal of 421041386628 is 826683140124.

421041386628 is a `hidden beast` number, since 4 + 2 + 1 + 0 + 4 + 13 + 8 + 6 + 628 = 666.

It can be written as a sum of positive squares in only one way, i.e., 257152438404 + 163888948224 = 507102^2 + 404832^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is not an unprimeable number, because it can be changed into a prime (421041386621) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 5847797001 + ... + 5847797072.

Almost surely, 2^421041386628 is an apocalyptic number.

It is an amenable number.

421041386628 is an abundant number, since it is smaller than the sum of its proper divisors (643257674106).

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

421041386628 is a wasteful number, since it uses less digits than its factorization.

421041386628 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11695594083 (or 11695594078 counting only the distinct ones).

The product of its (nonzero) digits is 442368, while the sum is 45.

The spelling of 421041386628 in words is "four hundred twenty-one billion, forty-one million, three hundred eighty-six thousand, six hundred twenty-eight".