1399921696 has 48 divisors (see below), whose sum is σ = 2861066880. Its totient is φ = 673793280.

The previous prime is 1399921687. The next prime is 1399921793. The reversal of 1399921696 is 6961299931.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 84115 + ... + 99373.

It is an arithmetic number, because the mean of its divisors is an integer number (59605560).

Almost surely, 2^1399921696 is an apocalyptic number.

1399921696 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 1399921696, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1430533440).

1399921696 is an abundant number, since it is smaller than the sum of its proper divisors (1461145184).

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

1399921696 is a wasteful number, since it uses less digits than its factorization.

1399921696 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15377 (or 15369 counting only the distinct ones).

The product of its digits is 1417176, while the sum is 55.

The square root of 1399921696 is about 37415.5274718933. The cubic root of 1399921696 is about 1118.6680850690.

The spelling of 1399921696 in words is "one billion, three hundred ninety-nine million, nine hundred twenty-one thousand, six hundred ninety-six".