402420420042 has 64 divisors (see below), whose sum is σ = 832661544960. Its totient is φ = 129583232064.

The previous prime is 402420420019. The next prime is 402420420067. The reversal of 402420420042 is 240024024204.

It is a junction number, because it is equal to n+sod(n) for n = 402420419994 and 402420420021.

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, 71564043 + ... + 71569665.

It is an arithmetic number, because the mean of its divisors is an integer number (13010336640).

Almost surely, 2^402420420042 is an apocalyptic number.

402420420042 is an abundant number, since it is smaller than the sum of its proper divisors (430241124918).

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

402420420042 is a wasteful number, since it uses less digits than its factorization.

402420420042 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9107.

The product of its (nonzero) digits is 4096, while the sum is 24.

Adding to 402420420042 its reverse (240024024204), we get a palindrome (642444444246).

The spelling of 402420420042 in words is "four hundred two billion, four hundred twenty million, four hundred twenty thousand, forty-two".