1396188788 has 12 divisors (see below), whose sum is σ = 2522147712. Its totient is φ = 675575160.

The previous prime is 1396188779. The next prime is 1396188791. The reversal of 1396188788 is 8878816931.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5629670 + ... + 5629917.

It is an arithmetic number, because the mean of its divisors is an integer number (210178976).

Almost surely, 2^1396188788 is an apocalyptic number.

It is an amenable number.

1396188788 is a deficient number, since it is larger than the sum of its proper divisors (1125958924).

1396188788 is a wasteful number, since it uses less digits than its factorization.

1396188788 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11259622 (or 11259620 counting only the distinct ones).

The product of its digits is 4644864, while the sum is 59.

The square root of 1396188788 is about 37365.6096966181. The cubic root of 1396188788 is about 1117.6728860168.

The spelling of 1396188788 in words is "one billion, three hundred ninety-six million, one hundred eighty-eight thousand, seven hundred eighty-eight".