400426042 has 4 divisors (see below), whose sum is σ = 600639066. Its totient is φ = 200213020.

The previous prime is 400426003. The next prime is 400426051. The reversal of 400426042 is 240624004.

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., 350850361 + 49575681 = 18731^2 + 7041^2 .

It is a super-2 number, since 2×400426042² = 320682030223571528, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 100106509 + ... + 100106512.

Almost surely, 2^400426042 is an apocalyptic number.

400426042 is a deficient number, since it is larger than the sum of its proper divisors (200213024).

400426042 is a wasteful number, since it uses less digits than its factorization.

400426042 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 200213023.

The product of its (nonzero) digits is 1536, while the sum is 22.

The square root of 400426042 is about 20010.6482153877. The cubic root of 400426042 is about 737.0677989333.

The spelling of 400426042 in words is "four hundred million, four hundred twenty-six thousand, forty-two".