400006002 has 32 divisors (see below), whose sum is σ = 891316224. Its totient is φ = 118634000.

The previous prime is 400005973. The next prime is 400006003. The reversal of 400006002 is 200600004.

It is not an unprimeable number, because it can be changed into a prime (400006003) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 61374 + ... + 67577.

It is an arithmetic number, because the mean of its divisors is an integer number (27853632).

Almost surely, 2^400006002 is an apocalyptic number.

400006002 is an abundant number, since it is smaller than the sum of its proper divisors (491310222).

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

400006002 is a wasteful number, since it uses less digits than its factorization.

400006002 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 129014.

The product of its (nonzero) digits is 48, while the sum is 12.

The square root of 400006002 is about 20000.1500494371. The cubic root of 400006002 is about 736.8099849692.

Adding to 400006002 its reverse (200600004), we get a palindrome (600606006).

The spelling of 400006002 in words is "four hundred million, six thousand, two".