400023202 has 4 divisors (see below), whose sum is σ = 600034806. Its totient is φ = 200011600.

The previous prime is 400023181. The next prime is 400023223. The reversal of 400023202 is 202320004.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (400023181) and next prime (400023223).

It can be written as a sum of positive squares in only one way, i.e., 398361681 + 1661521 = 19959^2 + 1289^2 .

It is a Smith number, since the sum of its digits (13) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 100005799 + ... + 100005802.

Almost surely, 2^400023202 is an apocalyptic number.

400023202 is a deficient number, since it is larger than the sum of its proper divisors (200011604).

400023202 is a wasteful number, since it uses less digits than its factorization.

400023202 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 200011603.

The product of its (nonzero) digits is 96, while the sum is 13.

The square root of 400023202 is about 20000.5800415888. The cubic root of 400023202 is about 736.8205456024.

Adding to 400023202 its reverse (202320004), we get a palindrome (602343206).

The spelling of 400023202 in words is "four hundred million, twenty-three thousand, two hundred two".