400240310242 has 8 divisors (see below), whose sum is σ = 600366259116. Its totient is φ = 200118223872.

The previous prime is 400240310149. The next prime is 400240310293. The reversal of 400240310242 is 242013042004.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 399589601161 + 650709081 = 632131^2 + 25509^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×400240310242² (a number of 24 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 690943 + ... + 1130434.

Almost surely, 2^400240310242 is an apocalyptic number.

400240310242 is a deficient number, since it is larger than the sum of its proper divisors (200125948874).

400240310242 is a wasteful number, since it uses less digits than its factorization.

400240310242 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1931252.

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

Adding to 400240310242 its reverse (242013042004), we get a palindrome (642253352246).

The spelling of 400240310242 in words is "four hundred billion, two hundred forty million, three hundred ten thousand, two hundred forty-two".