401311320 has 32 divisors (see below), whose sum is σ = 1203934320. Its totient is φ = 107016320.

The previous prime is 401311301. The next prime is 401311327. The reversal of 401311320 is 23113104.

It is a super-2 number, since 2×401311320² = 322101551120284800, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 401311320.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (401311327) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1672011 + ... + 1672250.

Almost surely, 2^401311320 is an apocalyptic number.

401311320 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

401311320 is an abundant number, since it is smaller than the sum of its proper divisors (802623000).

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

401311320 is a wasteful number, since it uses less digits than its factorization.

401311320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3344275 (or 3344271 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 15.

The square root of 401311320 is about 20032.7561758236. The cubic root of 401311320 is about 737.6105788420.

Adding to 401311320 its reverse (23113104), we get a palindrome (424424424).

The spelling of 401311320 in words is "four hundred one million, three hundred eleven thousand, three hundred twenty".