400400042693 has 8 divisors (see below), whose sum is σ = 457630432320. Its totient is φ = 343177248960.

The previous prime is 400400042677. The next prime is 400400042719. The reversal of 400400042693 is 396240004004.

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

It is not a de Polignac number, because 400400042693 - 2⁴ = 400400042677 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (400400042633) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1785563 + ... + 1997256.

It is an arithmetic number, because the mean of its divisors is an integer number (57203804040).

Almost surely, 2^400400042693 is an apocalyptic number.

It is an amenable number.

400400042693 is a deficient number, since it is larger than the sum of its proper divisors (57230389627).

400400042693 is a wasteful number, since it uses less digits than its factorization.

400400042693 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3797947.

The product of its (nonzero) digits is 20736, while the sum is 32.

Adding to 400400042693 its reverse (396240004004), we get a palindrome (796640046697).

The spelling of 400400042693 in words is "four hundred billion, four hundred million, forty-two thousand, six hundred ninety-three".