401321320 has 16 divisors (see below), whose sum is σ = 902973060. Its totient is φ = 160528512.

The previous prime is 401321317. The next prime is 401321399. The reversal of 401321320 is 23123104.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 396886084 + 4435236 = 19922^2 + 2106^2 .

It is a super-2 number, since 2×401321320² = 322117603773084800, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 401321294 and 401321303.

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, 5016477 + ... + 5016556.

Almost surely, 2^401321320 is an apocalyptic number.

401321320 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

401321320 is an abundant number, since it is smaller than the sum of its proper divisors (501651740).

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

401321320 is a wasteful number, since it uses less digits than its factorization.

401321320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10033044 (or 10033040 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 16.

The square root of 401321320 is about 20033.0057654861. The cubic root of 401321320 is about 737.6167054609.

Adding to 401321320 its reverse (23123104), we get a palindrome (424444424).

The spelling of 401321320 in words is "four hundred one million, three hundred twenty-one thousand, three hundred twenty".