1401431444220 has 48 divisors (see below), whose sum is σ = 3924958171680. Its totient is φ = 373624563456.

The previous prime is 1401431444201. The next prime is 1401431444249. The reversal of 1401431444220 is 224441341041.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2577715 + ... + 3073674.

It is an arithmetic number, because the mean of its divisors is an integer number (81769961910).

Almost surely, 2^{1401431444220} is an apocalyptic number.

1401431444220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1401431444220 is an abundant number, since it is smaller than the sum of its proper divisors (2523526727460).

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

1401431444220 is a wasteful number, since it uses less digits than its factorization.

1401431444220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5655534 (or 5655532 counting only the distinct ones).

The product of its (nonzero) digits is 12288, while the sum is 30.

Adding to 1401431444220 its reverse (224441341041), we get a palindrome (1625872785261).

The spelling of 1401431444220 in words is "one trillion, four hundred one billion, four hundred thirty-one million, four hundred forty-four thousand, two hundred twenty".