402844090 has 36 divisors (see below), whose sum is σ = 798415758. Its totient is φ = 146234880.

The previous prime is 402844067. The next prime is 402844093. The reversal of 402844090 is 90448204.

It can be written as a sum of positive squares in 3 ways, for example, as 380367009 + 22477081 = 19503^2 + 4741^2 .

It is not an unprimeable number, because it can be changed into a prime (402844093) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 697882 + ... + 698458.

Almost surely, 2^402844090 is an apocalyptic number.

402844090 is a deficient number, since it is larger than the sum of its proper divisors (395571668).

402844090 is an equidigital number, since it uses as much as digits as its factorization.

402844090 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1183 (or 595 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 31.

The square root of 402844090 is about 20070.9763090887. The cubic root of 402844090 is about 738.5484633615.

The spelling of 402844090 in words is "four hundred two million, eight hundred forty-four thousand, ninety".