1394000816 has 80 divisors (see below), whose sum is σ = 3241980000. Its totient is φ = 573640704.

The previous prime is 1394000809. The next prime is 1394000857. The reversal of 1394000816 is 6180004931.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 56810 + ... + 77558.

It is an arithmetic number, because the mean of its divisors is an integer number (40524750).

Almost surely, 2^1394000816 is an apocalyptic number.

1394000816 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 1394000816, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1620990000).

1394000816 is an abundant number, since it is smaller than the sum of its proper divisors (1847979184).

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

1394000816 is a wasteful number, since it uses less digits than its factorization.

1394000816 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20806 (or 20800 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 32.

The square root of 1394000816 is about 37336.3203328877. The cubic root of 1394000816 is about 1117.0887444997.

The spelling of 1394000816 in words is "one billion, three hundred ninety-four million, eight hundred sixteen", and thus it is an aban number.