402424424244 has 36 divisors (see below), whose sum is σ = 1017259150180. Its totient is φ = 134138885760.

The previous prime is 402424424221. The next prime is 402424424257. The reversal of 402424424244 is 442424424204.

402424424244 is a `hidden beast` number, since 402 + 4 + 2 + 4 + 4 + 2 + 4 + 244 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 355514062500 + 46910361744 = 596250^2 + 216588^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is a super-2 number, since 2×402424424244² (a number of 24 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 402424424199 and 402424424208.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3047952 + ... + 3177240.

Almost surely, 2^402424424244 is an apocalyptic number.

It is an amenable number.

402424424244 is an abundant number, since it is smaller than the sum of its proper divisors (614834725936).

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

402424424244 is a wasteful number, since it uses less digits than its factorization.

402424424244 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 215760 (or 215755 counting only the distinct ones).

The product of its (nonzero) digits is 262144, while the sum is 36.

Adding to 402424424244 its reverse (442424424204), we get a palindrome (844848848448).

The spelling of 402424424244 in words is "four hundred two billion, four hundred twenty-four million, four hundred twenty-four thousand, two hundred forty-four".