420423010440 has 128 divisors (see below), whose sum is σ = 1335656770560. Its totient is φ = 105502490624.

The previous prime is 420423010409. The next prime is 420423010517. The reversal of 420423010440 is 44010324024.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a self number, because there is not a number n which added to its sum of digits gives 420423010440.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 21334672 + ... + 21354368.

It is an arithmetic number, because the mean of its divisors is an integer number (10434818520).

Almost surely, 2^420423010440 is an apocalyptic number.

420423010440 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

420423010440 is an abundant number, since it is smaller than the sum of its proper divisors (915233760120).

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

420423010440 is a wasteful number, since it uses less digits than its factorization.

420423010440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30191 (or 30187 counting only the distinct ones).

The product of its (nonzero) digits is 3072, while the sum is 24.

Adding to 420423010440 its reverse (44010324024), we get a palindrome (464433334464).

The spelling of 420423010440 in words is "four hundred twenty billion, four hundred twenty-three million, ten thousand, four hundred forty".