400344102 has 12 divisors (see below), whose sum is σ = 867412260. Its totient is φ = 133448028.

The previous prime is 400344097. The next prime is 400344121. The reversal of 400344102 is 201443004.

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: 22241339 = 400344102 / (4 + 0 + 0 + 3 + 4 + 4 + 1 + 0 + 2).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 11120652 + ... + 11120687.

It is an arithmetic number, because the mean of its divisors is an integer number (72284355).

Almost surely, 2^400344102 is an apocalyptic number.

400344102 is an abundant number, since it is smaller than the sum of its proper divisors (467068158).

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

400344102 is a wasteful number, since it uses less digits than its factorization.

400344102 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22241347 (or 22241344 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 18.

The square root of 400344102 is about 20008.6007006987. The cubic root of 400344102 is about 737.0175196065.

Adding to 400344102 its reverse (201443004), we get a palindrome (601787106).

The spelling of 400344102 in words is "four hundred million, three hundred forty-four thousand, one hundred two".