1396921328 has 40 divisors (see below), whose sum is σ = 2979712560. Its totient is φ = 629130240.

The previous prime is 1396921327. The next prime is 1396921367. The reversal of 1396921328 is 8231296931.

It is a Harshad number since it is a multiple of its sum of digits (44).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1396921321) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 17225 + ... + 55592.

It is an arithmetic number, because the mean of its divisors is an integer number (74492814).

Almost surely, 2^1396921328 is an apocalyptic number.

It is an amenable number.

1396921328 is an abundant number, since it is smaller than the sum of its proper divisors (1582791232).

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

1396921328 is a wasteful number, since it uses less digits than its factorization.

1396921328 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 72945 (or 72939 counting only the distinct ones).

The product of its digits is 139968, while the sum is 44.

The square root of 1396921328 is about 37375.4107402180. The cubic root of 1396921328 is about 1117.8683220865.

The spelling of 1396921328 in words is "one billion, three hundred ninety-six million, nine hundred twenty-one thousand, three hundred twenty-eight".