421940385810 has 24 divisors (see below), whose sum is σ = 1097045003340. Its totient is φ = 112517436192.

The previous prime is 421940385791. The next prime is 421940385821. The reversal of 421940385810 is 18583049124.

421940385810 is a `hidden beast` number, since 4 + 2 + 194 + 0 + 385 + 81 + 0 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 400943506401 + 20996879409 = 633201^2 + 144903^2 .

It is a super-2 number, since 2×421940385810² (a number of 24 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2344113165 + ... + 2344113344.

Almost surely, 2^421940385810 is an apocalyptic number.

421940385810 is an abundant number, since it is smaller than the sum of its proper divisors (675104617530).

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

421940385810 is a wasteful number, since it uses less digits than its factorization.

421940385810 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4688226522 (or 4688226519 counting only the distinct ones).

The product of its (nonzero) digits is 276480, while the sum is 45.

The spelling of 421940385810 in words is "four hundred twenty-one billion, nine hundred forty million, three hundred eighty-five thousand, eight hundred ten".