1401988841 has 16 divisors (see below), whose sum is σ = 1538799360. Its totient is φ = 1266768720.

The previous prime is 1401988831. The next prime is 1401988849. The reversal of 1401988841 is 1488891041.

It is a cyclic number.

It is not a de Polignac number, because 1401988841 - 2¹⁰ = 1401987817 is a prime.

It is a Smith number, since the sum of its digits (44) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1401988792 and 1401988801.

It is not an unprimeable number, because it can be changed into a prime (1401988849) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2180066 + ... + 2180708.

It is an arithmetic number, because the mean of its divisors is an integer number (96174960).

Almost surely, 2^1401988841 is an apocalyptic number.

1401988841 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1401988841 is a deficient number, since it is larger than the sum of its proper divisors (136810519).

1401988841 is a wasteful number, since it uses less digits than its factorization.

1401988841 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1556.

The product of its (nonzero) digits is 73728, while the sum is 44.

The square root of 1401988841 is about 37443.1414413908. The cubic root of 1401988841 is about 1119.2184282011.

The spelling of 1401988841 in words is "one billion, four hundred one million, nine hundred eighty-eight thousand, eight hundred forty-one".