1401981696 has 216 divisors, whose sum is σ = 4333149184. Its totient is φ = 451630080.

The previous prime is 1401981673. The next prime is 1401981701. The reversal of 1401981696 is 6961891041.

It is a tau number, because it is divible by the number of its divisors (216).

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1928085 + ... + 1928811.

Almost surely, 2^1401981696 is an apocalyptic number.

1401981696 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1401981696, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2166574592).

1401981696 is an abundant number, since it is smaller than the sum of its proper divisors (2931167488).

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

1401981696 is an frugal number, since it uses more digits than its factorization.

1401981696 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 789 (or 763 counting only the distinct ones).

The product of its (nonzero) digits is 93312, while the sum is 45.

The square root of 1401981696 is about 37443.0460299373. The cubic root of 1401981696 is about 1119.2165268951.

The spelling of 1401981696 in words is "one billion, four hundred one million, nine hundred eighty-one thousand, six hundred ninety-six".