400040342 has 8 divisors (see below), whose sum is σ = 646219056. Its totient is φ = 184633992.

The previous prime is 400040327. The next prime is 400040363. The reversal of 400040342 is 243040004.

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

It is a self number, because there is not a number n which added to its sum of digits gives 400040342.

It is a congruent number.

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, 7693058 + ... + 7693109.

It is an arithmetic number, because the mean of its divisors is an integer number (80777382).

Almost surely, 2^400040342 is an apocalyptic number.

400040342 is a deficient number, since it is larger than the sum of its proper divisors (246178714).

400040342 is a wasteful number, since it uses less digits than its factorization.

400040342 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15386182.

The product of its (nonzero) digits is 384, while the sum is 17.

The square root of 400040342 is about 20001.0085245720. The cubic root of 400040342 is about 736.8310690952.

Adding to 400040342 its reverse (243040004), we get a palindrome (643080346).

The spelling of 400040342 in words is "four hundred million, forty thousand, three hundred forty-two".