400401002 has 8 divisors (see below), whose sum is σ = 603115200. Its totient is φ = 199362604.

The previous prime is 400400981. The next prime is 400401019. The reversal of 400401002 is 200104004.

It is a sphenic number, since it is the product of 3 distinct primes.

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 3 ways as a sum of consecutive naturals, for example, 418352 + ... + 419307.

It is an arithmetic number, because the mean of its divisors is an integer number (75389400).

Almost surely, 2^400401002 is an apocalyptic number.

400401002 is a deficient number, since it is larger than the sum of its proper divisors (202714198).

400401002 is a wasteful number, since it uses less digits than its factorization.

400401002 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 837900.

The product of its (nonzero) digits is 32, while the sum is 11.

The square root of 400401002 is about 20010.0225387179. The cubic root of 400401002 is about 737.0524348290.

Adding to 400401002 its reverse (200104004), we get a palindrome (600505006).

The spelling of 400401002 in words is "four hundred million, four hundred one thousand, two".