402644424440 has 16 divisors (see below), whose sum is σ = 905949955080. Its totient is φ = 161057769760.

The previous prime is 402644424361. The next prime is 402644424463. The reversal of 402644424440 is 44424446204.

It is a junction number, because it is equal to n+sod(n) for n = 402644424394 and 402644424403.

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, 5033055266 + ... + 5033055345.

Almost surely, 2^402644424440 is an apocalyptic number.

402644424440 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

402644424440 is an abundant number, since it is smaller than the sum of its proper divisors (503305530640).

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

402644424440 is a wasteful number, since it uses less digits than its factorization.

402644424440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10066110622 (or 10066110618 counting only the distinct ones).

The product of its (nonzero) digits is 393216, while the sum is 38.

The spelling of 402644424440 in words is "four hundred two billion, six hundred forty-four million, four hundred twenty-four thousand, four hundred forty".