402000244440 has 64 divisors (see below), whose sum is σ = 1217941371360. Its totient is φ = 106138675200.

The previous prime is 402000244367. The next prime is 402000244493. The reversal of 402000244440 is 44442000204.

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 402000244440.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 16572049 + ... + 16596288.

Almost surely, 2^402000244440 is an apocalyptic number.

402000244440 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

402000244440 is an abundant number, since it is smaller than the sum of its proper divisors (815941126920).

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

402000244440 is a wasteful number, since it uses less digits than its factorization.

402000244440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33168452 (or 33168448 counting only the distinct ones).

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

Adding to 402000244440 its reverse (44442000204), we get a palindrome (446442244644).

The spelling of 402000244440 in words is "four hundred two billion, two hundred forty-four thousand, four hundred forty".