1391948588 has 12 divisors (see below), whose sum is σ = 2564115960. Its totient is φ = 659344032.

The previous prime is 1391948581. The next prime is 1391948603. The reversal of 1391948588 is 8858491931.

It is not an unprimeable number, because it can be changed into a prime (1391948581) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9157481 + ... + 9157632.

It is an arithmetic number, because the mean of its divisors is an integer number (213676330).

Almost surely, 2^1391948588 is an apocalyptic number.

It is an amenable number.

1391948588 is a deficient number, since it is larger than the sum of its proper divisors (1172167372).

1391948588 is a wasteful number, since it uses less digits than its factorization.

1391948588 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18315136 (or 18315134 counting only the distinct ones).

The product of its digits is 2488320, while the sum is 56.

The square root of 1391948588 is about 37308.8272128728. The cubic root of 1391948588 is about 1116.5402879278.

The spelling of 1391948588 in words is "one billion, three hundred ninety-one million, nine hundred forty-eight thousand, five hundred eighty-eight".