1388815 has 8 divisors (see below), whose sum is σ = 1764720. Its totient is φ = 1045632.

The previous prime is 1388797. The next prime is 1388819. The reversal of 1388815 is 5188831.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1388815 - 2⁷ = 1388687 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1388819) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8085 + ... + 8254.

It is an arithmetic number, because the mean of its divisors is an integer number (220590).

2^1388815 is an apocalyptic number.

1388815 is a deficient number, since it is larger than the sum of its proper divisors (375905).

1388815 is a wasteful number, since it uses less digits than its factorization.

1388815 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16361.

The product of its digits is 7680, while the sum is 34.

The square root of 1388815 is about 1178.4799531600. The cubic root of 1388815 is about 111.5701797657.

The spelling of 1388815 in words is "one million, three hundred eighty-eight thousand, eight hundred fifteen".