1401311220 has 48 divisors (see below), whose sum is σ = 3925309248. Its totient is φ = 373527040.

The previous prime is 1401311209. The next prime is 1401311239. The reversal of 1401311220 is 221131041.

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 1401311220.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 251707 + ... + 257213.

It is an arithmetic number, because the mean of its divisors is an integer number (81777276).

Almost surely, 2^1401311220 is an apocalyptic number.

1401311220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1401311220 is an abundant number, since it is smaller than the sum of its proper divisors (2523998028).

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

1401311220 is a wasteful number, since it uses less digits than its factorization.

1401311220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9760 (or 9758 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 15.

The square root of 1401311220 is about 37434.0916812469. The cubic root of 1401311220 is about 1119.0380824647.

Adding to 1401311220 its reverse (221131041), we get a palindrome (1622442261).

The spelling of 1401311220 in words is "one billion, four hundred one million, three hundred eleven thousand, two hundred twenty".