400042002 has 32 divisors (see below), whose sum is σ = 841768704. Its totient is φ = 126576000.

The previous prime is 400042001. The next prime is 400042003. The reversal of 400042002 is 200240004.

It is an interprime number because it is at equal distance from previous prime (400042001) and next prime (400042003).

It is not an unprimeable number, because it can be changed into a prime (400042001) 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, 12874 + ... + 31077.

It is an arithmetic number, because the mean of its divisors is an integer number (26305272).

Almost surely, 2^400042002 is an apocalyptic number.

400042002 is an abundant number, since it is smaller than the sum of its proper divisors (441726702).

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

400042002 is a wasteful number, since it uses less digits than its factorization.

400042002 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44034.

The product of its (nonzero) digits is 64, while the sum is 12.

The square root of 400042002 is about 20001.0500224363. The cubic root of 400042002 is about 736.8320882740.

Adding to 400042002 its reverse (200240004), we get a palindrome (600282006).

It can be divided in two parts, 40004 and 2002, that multiplied together give a palindrome (80088008).

The spelling of 400042002 in words is "four hundred million, forty-two thousand, two".