402000444040 has 64 divisors (see below), whose sum is σ = 974563475760. Its totient is φ = 148356956160.

The previous prime is 402000444023. The next prime is 402000444047. The reversal of 402000444040 is 40444000204.

It can be written as a sum of positive squares in 8 ways, for example, as 66604254084 + 335396189956 = 258078^2 + 579134^2 .

It is not an unprimeable number, because it can be changed into a prime (402000444047) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 857200 + ... + 1240480.

Almost surely, 2^402000444040 is an apocalyptic number.

402000444040 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

402000444040 is an abundant number, since it is smaller than the sum of its proper divisors (572563031720).

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

402000444040 is a wasteful number, since it uses less digits than its factorization.

402000444040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 385322 (or 385318 counting only the distinct ones).

The product of its (nonzero) digits is 2048, while the sum is 22.

Adding to 402000444040 its reverse (40444000204), we get a palindrome (442444444244).

The spelling of 402000444040 in words is "four hundred two billion, four hundred forty-four thousand, forty".