402031020044 has 18 divisors (see below), whose sum is σ = 747374277300. Its totient is φ = 189191067712.

The previous prime is 402031019963. The next prime is 402031020059. The reversal of 402031020044 is 440020130204.

It is a junction number, because it is equal to n+sod(n) for n = 402031019998 and 402031020025.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 173887694 + ... + 173890005.

Almost surely, 2^402031020044 is an apocalyptic number.

It is an amenable number.

402031020044 is a deficient number, since it is larger than the sum of its proper divisors (345343257256).

402031020044 is a wasteful number, since it uses less digits than its factorization.

402031020044 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 347777737 (or 347777718 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 20.

Adding to 402031020044 its reverse (440020130204), we get a palindrome (842051150248).

The spelling of 402031020044 in words is "four hundred two billion, thirty-one million, twenty thousand, forty-four".