402242021440 has 56 divisors (see below), whose sum is σ = 1094672935872. Its totient is φ = 137911549440.

The previous prime is 402242021339. The next prime is 402242021473. The reversal of 402242021440 is 44120242204.

It is a tau number, because it is divible by the number of its divisors (56).

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 7 ways as a sum of consecutive naturals, for example, 89783926 + ... + 89788405.

Almost surely, 2^402242021440 is an apocalyptic number.

402242021440 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

402242021440 is an abundant number, since it is smaller than the sum of its proper divisors (692430914432).

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

402242021440 is a wasteful number, since it uses less digits than its factorization.

402242021440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 179572355 (or 179572345 counting only the distinct ones).

The product of its (nonzero) digits is 4096, while the sum is 25.

Adding to 402242021440 its reverse (44120242204), we get a palindrome (446362263644).

The spelling of 402242021440 in words is "four hundred two billion, two hundred forty-two million, twenty-one thousand, four hundred forty".