400144002 has 16 divisors (see below), whose sum is σ = 801425280. Its totient is φ = 133191792.

The previous prime is 400143929. The next prime is 400144049. The reversal of 400144002 is 200441004.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 42778 + ... + 51285.

It is an arithmetic number, because the mean of its divisors is an integer number (50089080).

Almost surely, 2^400144002 is an apocalyptic number.

400144002 is an abundant number, since it is smaller than the sum of its proper divisors (401281278).

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

400144002 is a wasteful number, since it uses less digits than its factorization.

400144002 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 94777.

The product of its (nonzero) digits is 128, while the sum is 15.

The square root of 400144002 is about 20003.5997260493. The cubic root of 400144002 is about 736.8947071039.

Adding to 400144002 its reverse (200441004), we get a palindrome (600585006).

The spelling of 400144002 in words is "four hundred million, one hundred forty-four thousand, two".