1401988416 has 56 divisors (see below), whose sum is σ = 3904670880. Its totient is φ = 442732032.

The previous prime is 1401988409. The next prime is 1401988421. The reversal of 1401988416 is 6148891041.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 188511 + ... + 195806.

Almost surely, 2^1401988416 is an apocalyptic number.

1401988416 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

1401988416 is an abundant number, since it is smaller than the sum of its proper divisors (2502682464).

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

1401988416 is a wasteful number, since it uses less digits than its factorization.

1401988416 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 384351 (or 384341 counting only the distinct ones).

The product of its (nonzero) digits is 55296, while the sum is 42.

The square root of 1401988416 is about 37443.1357661187. The cubic root of 1401988416 is about 1119.2183151075.

The spelling of 1401988416 in words is "one billion, four hundred one million, nine hundred eighty-eight thousand, four hundred sixteen".