400522 has 8 divisors (see below), whose sum is σ = 626976. Its totient is φ = 191532.

The previous prime is 400481. The next prime is 400523. The reversal of 400522 is 225004.

It is a happy number.

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

It is not an unprimeable number, because it can be changed into a prime (400523) by changing a digit.

400522 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4308 + ... + 4399.

It is an arithmetic number, because the mean of its divisors is an integer number (78372).

2⁴⁰⁰⁵²² is an apocalyptic number.

400522 is a deficient number, since it is larger than the sum of its proper divisors (226454).

400522 is a wasteful number, since it uses less digits than its factorization.

400522 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8732.

The product of its (nonzero) digits is 80, while the sum is 13.

The square root of 400522 is about 632.8680747202. The cubic root of 400522 is about 73.7126671147.

Adding to 400522 its reverse (225004), we get a palindrome (625526).

The spelling of 400522 in words is "four hundred thousand, five hundred twenty-two".