421402004040 has 32 divisors (see below), whose sum is σ = 1264206012480. Its totient is φ = 112373867712.

The previous prime is 421402004039. The next prime is 421402004083. The reversal of 421402004040 is 40400204124.

It is a junction number, because it is equal to n+sod(n) for n = 421402003998 and 421402004016.

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, 1755841564 + ... + 1755841803.

It is an arithmetic number, because the mean of its divisors is an integer number (39506437890).

Almost surely, 2^421402004040 is an apocalyptic number.

421402004040 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

421402004040 is an abundant number, since it is smaller than the sum of its proper divisors (842804008440).

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

421402004040 is a wasteful number, since it uses less digits than its factorization.

421402004040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3511683381 (or 3511683377 counting only the distinct ones).

The product of its (nonzero) digits is 1024, while the sum is 21.

Adding to 421402004040 its reverse (40400204124), we get a palindrome (461802208164).

The spelling of 421402004040 in words is "four hundred twenty-one billion, four hundred two million, four thousand, forty".