401220312 has 32 divisors (see below), whose sum is σ = 1003585200. Its totient is φ = 133668864.

The previous prime is 401220311. The next prime is 401220317. The reversal of 401220312 is 213022104.

It is a super-2 number, since 2×401220312² = 321955477522754688, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 401220291 and 401220300.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (401220311) 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, 61428 + ... + 67644.

Almost surely, 2^401220312 is an apocalyptic number.

It is an amenable number.

401220312 is an abundant number, since it is smaller than the sum of its proper divisors (602364888).

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

401220312 is a wasteful number, since it uses less digits than its factorization.

401220312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8915 (or 8911 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 15.

The square root of 401220312 is about 20030.4845672789. The cubic root of 401220312 is about 737.5548170305.

Adding to 401220312 its reverse (213022104), we get a palindrome (614242416).

The spelling of 401220312 in words is "four hundred one million, two hundred twenty thousand, three hundred twelve".