1391798800 has 120 divisors (see below), whose sum is σ = 3875859072. Its totient is φ = 470400000.

The previous prime is 1391798797. The next prime is 1391798803. The reversal of 1391798800 is 88971931.

It is an interprime number because it is at equal distance from previous prime (1391798797) and next prime (1391798803).

It is not an unprimeable number, because it can be changed into a prime (1391798803) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 195300 + ... + 202300.

Almost surely, 2^1391798800 is an apocalyptic number.

1391798800 is a gapful number since it is divisible by the number (10) 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 1391798800, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1937929536).

1391798800 is an abundant number, since it is smaller than the sum of its proper divisors (2484060272).

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

1391798800 is a wasteful number, since it uses less digits than its factorization.

1391798800 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7097 (or 7086 counting only the distinct ones).

The product of its (nonzero) digits is 108864, while the sum is 46.

The square root of 1391798800 is about 37306.8197518899. The cubic root of 1391798800 is about 1116.5002360807.

The spelling of 1391798800 in words is "one billion, three hundred ninety-one million, seven hundred ninety-eight thousand, eight hundred".