400055002 has 4 divisors (see below), whose sum is σ = 600082506. Its totient is φ = 200027500.

The previous prime is 400054979. The next prime is 400055009. The reversal of 400055002 is 200550004.

It is a happy number.

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

It can be written as a sum of positive squares in only one way, i.e., 284900641 + 115154361 = 16879^2 + 10731^2 .

It is not an unprimeable number, because it can be changed into a prime (400055009) 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, 100013749 + ... + 100013752.

Almost surely, 2^400055002 is an apocalyptic number.

400055002 is a deficient number, since it is larger than the sum of its proper divisors (200027504).

400055002 is a wasteful number, since it uses less digits than its factorization.

400055002 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 200027503.

The product of its (nonzero) digits is 200, while the sum is 16.

The square root of 400055002 is about 20001.3750027342. The cubic root of 400055002 is about 736.8400696970.

The spelling of 400055002 in words is "four hundred million, fifty-five thousand, two".