1388340659 has 12 divisors (see below), whose sum is σ = 1475018640. Its totient is φ = 1306508400.

The previous prime is 1388340643. The next prime is 1388340691. The reversal of 1388340659 is 9560438831.

It is not a de Polignac number, because 1388340659 - 2⁴ = 1388340643 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1388340619) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 41777 + ... + 67245.

It is an arithmetic number, because the mean of its divisors is an integer number (122918220).

Almost surely, 2^1388340659 is an apocalyptic number.

1388340659 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

1388340659 is a deficient number, since it is larger than the sum of its proper divisors (86677981).

1388340659 is a wasteful number, since it uses less digits than its factorization.

1388340659 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25658 (or 25639 counting only the distinct ones).

The product of its (nonzero) digits is 622080, while the sum is 47.

The square root of 1388340659 is about 37260.4436232313. The cubic root of 1388340659 is about 1115.5747628899.

The spelling of 1388340659 in words is "one billion, three hundred eighty-eight million, three hundred forty thousand, six hundred fifty-nine".