1401003220 has 24 divisors (see below), whose sum is σ = 2942811144. Its totient is φ = 560267136.

The previous prime is 1401003199. The next prime is 1401003223. The reversal of 1401003220 is 223001041.

It can be written as a sum of positive squares in 4 ways, for example, as 7772944 + 1393230276 = 2788^2 + 37326^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 1401003220.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1401003223) 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, 153094 + ... + 161986.

It is an arithmetic number, because the mean of its divisors is an integer number (122617131).

Almost surely, 2^1401003220 is an apocalyptic number.

1401003220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1401003220 is an abundant number, since it is smaller than the sum of its proper divisors (1541807924).

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

1401003220 is a wasteful number, since it uses less digits than its factorization.

1401003220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16779 (or 16777 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 13.

The square root of 1401003220 is about 37429.9775581017. The cubic root of 1401003220 is about 1118.9560904515.

Adding to 1401003220 its reverse (223001041), we get a palindrome (1624004261).

The spelling of 1401003220 in words is "one billion, four hundred one million, three thousand, two hundred twenty".