402000445 has 48 divisors (see below), whose sum is σ = 639070848. Its totient is φ = 235791360.

The previous prime is 402000439. The next prime is 402000491. The reversal of 402000445 is 544000204.

It is not a de Polignac number, because 402000445 - 2³ = 402000437 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 109459 + ... + 113071.

It is an arithmetic number, because the mean of its divisors is an integer number (13313976).

Almost surely, 2^402000445 is an apocalyptic number.

It is an amenable number.

402000445 is a deficient number, since it is larger than the sum of its proper divisors (237070403).

402000445 is a wasteful number, since it uses less digits than its factorization.

402000445 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3670 (or 3653 counting only the distinct ones).

The product of its (nonzero) digits is 640, while the sum is 19.

The square root of 402000445 is about 20049.9487530517. The cubic root of 402000445 is about 738.0325415350.

Adding to 402000445 its reverse (544000204), we get a palindrome (946000649).

The spelling of 402000445 in words is "four hundred two million, four hundred forty-five", and thus it is an aban number.