402839436642 has 16 divisors (see below), whose sum is σ = 806593388832. Its totient is φ = 134127392960.

The previous prime is 402839436641. The next prime is 402839436697. The reversal of 402839436642 is 246634938204.

It is a happy number.

It is a super-2 number, since 2×402839436642² (a number of 24 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (402839436641) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 38099088 + ... + 38109659.

It is an arithmetic number, because the mean of its divisors is an integer number (50412086802).

Almost surely, 2^402839436642 is an apocalyptic number.

402839436642 is an abundant number, since it is smaller than the sum of its proper divisors (403753952190).

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

402839436642 is a wasteful number, since it uses less digits than its factorization.

402839436642 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 76209633.

The product of its (nonzero) digits is 5971968, while the sum is 51.

The spelling of 402839436642 in words is "four hundred two billion, eight hundred thirty-nine million, four hundred thirty-six thousand, six hundred forty-two".