8440002 has 12 divisors (see below), whose sum is σ = 18286710. Its totient is φ = 2813328.

The previous prime is 8439989. The next prime is 8440031. The reversal of 8440002 is 2000448.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 7667361 + 772641 = 2769^2 + 879^2 .

It is a Harshad number since it is a multiple of its sum of digits (18), and also a Moran number because the ratio is a prime number: 468889 = 8440002 / (8 + 4 + 4 + 0 + 0 + 0 + 2).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 234427 + ... + 234462.

Almost surely, 2^8440002 is an apocalyptic number.

8440002 is an abundant number, since it is smaller than the sum of its proper divisors (9846708).

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

8440002 is a wasteful number, since it uses less digits than its factorization.

8440002 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 468897 (or 468894 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 18.

The square root of 8440002 is about 2905.1681534810. The cubic root of 8440002 is about 203.6014421385.

The spelling of 8440002 in words is "eight million, four hundred forty thousand, two".