400002102 has 24 divisors (see below), whose sum is σ = 867650160. Its totient is φ = 133183440.

The previous prime is 400002089. The next prime is 400002151. The reversal of 400002102 is 201200004.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4452 + ... + 28632.

It is an arithmetic number, because the mean of its divisors is an integer number (36152090).

Almost surely, 2^400002102 is an apocalyptic number.

400002102 is an abundant number, since it is smaller than the sum of its proper divisors (467648058).

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

400002102 is a wasteful number, since it uses less digits than its factorization.

400002102 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25108 (or 25105 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 9.

The square root of 400002102 is about 20000.0525499310. The cubic root of 400002102 is about 736.8075903649.

Adding to 400002102 its reverse (201200004), we get a palindrome (601202106).

The spelling of 400002102 in words is "four hundred million, two thousand, one hundred two".