402440220240 has 120 divisors (see below), whose sum is σ = 1304165382240. Its totient is φ = 102651386112.

The previous prime is 402440220239. The next prime is 402440220251. The reversal of 402440220240 is 42022044204.

It is a tau number, because it is divible by the number of its divisors (120).

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a self number, because there is not a number n which added to its sum of digits gives 402440220240.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1457950 + ... + 1711869.

It is an arithmetic number, because the mean of its divisors is an integer number (10868044852).

Almost surely, 2^402440220240 is an apocalyptic number.

402440220240 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

402440220240 is an abundant number, since it is smaller than the sum of its proper divisors (901725162000).

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

402440220240 is a wasteful number, since it uses less digits than its factorization.

402440220240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3169881 (or 3169852 counting only the distinct ones).

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

Adding to 402440220240 its reverse (42022044204), we get a palindrome (444462264444).

The spelling of 402440220240 in words is "four hundred two billion, four hundred forty million, two hundred twenty thousand, two hundred forty".