1401980237944 has 512 divisors, whose sum is σ = 3446489088000. Its totient is φ = 524898662400.

The previous prime is 1401980237939. The next prime is 1401980238007. The reversal of 1401980237944 is 4497320891041.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (52).

It is a junction number, because it is equal to n+sod(n) for n = 1401980237891 and 1401980237900.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 6644455999 + ... + 6644456209.

It is an arithmetic number, because the mean of its divisors is an integer number (6731424000).

Almost surely, 2^{1401980237944} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1401980237944, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1723244544000).

1401980237944 is an abundant number, since it is smaller than the sum of its proper divisors (2044508850056).

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

1401980237944 is a wasteful number, since it uses less digits than its factorization.

1401980237944 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 499 (or 495 counting only the distinct ones).

The product of its (nonzero) digits is 1741824, while the sum is 52.

The spelling of 1401980237944 in words is "one trillion, four hundred one billion, nine hundred eighty million, two hundred thirty-seven thousand, nine hundred forty-four".