400522172 has 24 divisors (see below), whose sum is σ = 709422000. Its totient is φ = 197842176.

The previous prime is 400522117. The next prime is 400522183. The reversal of 400522172 is 271225004.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 156479 + ... + 159017.

It is an arithmetic number, because the mean of its divisors is an integer number (29559250).

Almost surely, 2^400522172 is an apocalyptic number.

It is an amenable number.

400522172 is a deficient number, since it is larger than the sum of its proper divisors (308899828).

400522172 is a wasteful number, since it uses less digits than its factorization.

400522172 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3005 (or 3003 counting only the distinct ones).

The product of its (nonzero) digits is 1120, while the sum is 23.

The square root of 400522172 is about 20013.0500424098. The cubic root of 400522172 is about 737.1267766644.

Adding to 400522172 its reverse (271225004), we get a palindrome (671747176).

It can be divided in two parts, 40052 and 2172, that added together give a palindrome (42224).

The spelling of 400522172 in words is "four hundred million, five hundred twenty-two thousand, one hundred seventy-two".