400242004 has 6 divisors (see below), whose sum is σ = 700423514. Its totient is φ = 200121000.

The previous prime is 400242001. The next prime is 400242013.

400242004 is nontrivially palindromic in base 10.

It can be written as a sum of positive squares in only one way, i.e., 384081604 + 16160400 = 19598^2 + 4020^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (400242001) by changing a digit.

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 as a sum of consecutive naturals, namely, 50030247 + ... + 50030254.

Almost surely, 2^400242004 is an apocalyptic number.

It is an amenable number.

400242004 is a deficient number, since it is larger than the sum of its proper divisors (300181510).

400242004 is a wasteful number, since it uses less digits than its factorization.

400242004 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 100060505 (or 100060503 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 16.

The square root of 400242004 is about 20006.0491851840. The cubic root of 400242004 is about 736.9548614981.

The spelling of 400242004 in words is "four hundred million, two hundred forty-two thousand, four".