402400401042 has 64 divisors (see below), whose sum is σ = 881858897280. Its totient is φ = 121844050944.

The previous prime is 402400401037. The next prime is 402400401043. The reversal of 402400401042 is 240104004204.

It is not an unprimeable number, because it can be changed into a prime (402400401043) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 8267008 + ... + 8315540.

It is an arithmetic number, because the mean of its divisors is an integer number (13779045270).

Almost surely, 2^402400401042 is an apocalyptic number.

402400401042 is an abundant number, since it is smaller than the sum of its proper divisors (479458496238).

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

402400401042 is a wasteful number, since it uses less digits than its factorization.

402400401042 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51387.

The product of its (nonzero) digits is 1024, while the sum is 21.

Adding to 402400401042 its reverse (240104004204), we get a palindrome (642504405246).

The spelling of 402400401042 in words is "four hundred two billion, four hundred million, four hundred one thousand, forty-two".