402402420042 has 64 divisors (see below), whose sum is σ = 924173107200. Its totient is φ = 114423603840.

The previous prime is 402402419981. The next prime is 402402420053. The reversal of 402402420042 is 240024204204.

It is a junction number, because it is equal to n+sod(n) for n = 402402419994 and 402402420021.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 9881559 + ... + 9922197.

It is an arithmetic number, because the mean of its divisors is an integer number (14440204800).

Almost surely, 2^402402420042 is an apocalyptic number.

402402420042 is a gapful number since it is divisible by the number (42) formed by its first and last digit.

402402420042 is an abundant number, since it is smaller than the sum of its proper divisors (521770687158).

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

402402420042 is a wasteful number, since it uses less digits than its factorization.

402402420042 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41771.

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

Adding to 402402420042 its reverse (240024204204), we get a palindrome (642426624246).

The spelling of 402402420042 in words is "four hundred two billion, four hundred two million, four hundred twenty thousand, forty-two".