400155004422 has 48 divisors (see below), whose sum is σ = 872846385840. Its totient is φ = 132487655616.

The previous prime is 400155004421. The next prime is 400155004427. The reversal of 400155004422 is 224400551004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (400155004421) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2754888 + ... + 2896500.

It is an arithmetic number, because the mean of its divisors is an integer number (18184299705).

Almost surely, 2^400155004422 is an apocalyptic number.

400155004422 is an abundant number, since it is smaller than the sum of its proper divisors (472691381418).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

400155004422 is a wasteful number, since it uses less digits than its factorization.

400155004422 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 142677 (or 142674 counting only the distinct ones).

The product of its (nonzero) digits is 6400, while the sum is 27.

Adding to 400155004422 its reverse (224400551004), we get a palindrome (624555555426).

The spelling of 400155004422 in words is "four hundred billion, one hundred fifty-five million, four thousand, four hundred twenty-two".