402040424444 has 12 divisors (see below), whose sum is σ = 744957257184. Its totient is φ = 189195493824.

The previous prime is 402040424431. The next prime is 402040424453. The reversal of 402040424444 is 444424040204.

It is a super-2 number, since 2×402040424444² (a number of 24 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 402040424444.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2956179524 + ... + 2956179659.

It is an arithmetic number, because the mean of its divisors is an integer number (62079771432).

Almost surely, 2^402040424444 is an apocalyptic number.

It is an amenable number.

402040424444 is a deficient number, since it is larger than the sum of its proper divisors (342916832740).

402040424444 is a wasteful number, since it uses less digits than its factorization.

402040424444 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5912359204 (or 5912359202 counting only the distinct ones).

The product of its (nonzero) digits is 65536, while the sum is 32.

Adding to 402040424444 its reverse (444424040204), we get a palindrome (846464464648).

The spelling of 402040424444 in words is "four hundred two billion, forty million, four hundred twenty-four thousand, four hundred forty-four".