1393216188 has 48 divisors (see below), whose sum is σ = 4001034240. Its totient is φ = 367441344.

The previous prime is 1393216183. The next prime is 1393216189. The reversal of 1393216188 is 8816123931.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1393216183) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 636828 + ... + 639011.

It is an arithmetic number, because the mean of its divisors is an integer number (83354880).

Almost surely, 2^1393216188 is an apocalyptic number.

It is an amenable number.

1393216188 is an abundant number, since it is smaller than the sum of its proper divisors (2607818052).

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

1393216188 is a wasteful number, since it uses less digits than its factorization.

1393216188 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1275866 (or 1275864 counting only the distinct ones).

The product of its digits is 62208, while the sum is 42.

The square root of 1393216188 is about 37325.8112838824. The cubic root of 1393216188 is about 1116.8791167870.

The spelling of 1393216188 in words is "one billion, three hundred ninety-three million, two hundred sixteen thousand, one hundred eighty-eight".