402420420440 has 32 divisors (see below), whose sum is σ = 910448426160. Its totient is φ = 160078838400.

The previous prime is 402420420433. The next prime is 402420420449. The reversal of 402420420440 is 44024024204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (402420420449) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 27784226 + ... + 27798705.

Almost surely, 2^402420420440 is an apocalyptic number.

402420420440 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

402420420440 is an abundant number, since it is smaller than the sum of its proper divisors (508028005720).

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

402420420440 is a wasteful number, since it uses less digits than its factorization.

402420420440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55583123 (or 55583119 counting only the distinct ones).

The product of its (nonzero) digits is 8192, while the sum is 26.

Adding to 402420420440 its reverse (44024024204), we get a palindrome (446444444644).

The spelling of 402420420440 in words is "four hundred two billion, four hundred twenty million, four hundred twenty thousand, four hundred forty".