400321010 has 8 divisors (see below), whose sum is σ = 720577836. Its totient is φ = 160128400.

The previous prime is 400321001. The next prime is 400321039. The reversal of 400321010 is 10123004.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 367910761 + 32410249 = 19181^2 + 5693^2 .

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

It is a super-2 number, since 2×400321010² = 320513822094840200, which contains 22 as substring.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 400320982 and 400321000.

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, 20016041 + ... + 20016060.

Almost surely, 2^400321010 is an apocalyptic number.

400321010 is a deficient number, since it is larger than the sum of its proper divisors (320256826).

400321010 is a wasteful number, since it uses less digits than its factorization.

400321010 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40032108.

The product of its (nonzero) digits is 24, while the sum is 11.

The square root of 400321010 is about 20008.0236405298. The cubic root of 400321010 is about 737.0033488504.

Adding to 400321010 its reverse (10123004), we get a palindrome (410444014).

The spelling of 400321010 in words is "four hundred million, three hundred twenty-one thousand, ten".