1388967 has 8 divisors (see below), whose sum is σ = 1869696. Its totient is φ = 917112.

The previous prime is 1388963. The next prime is 1388969. The reversal of 1388967 is 7698831.

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

It is not a de Polignac number, because 1388967 - 2² = 1388963 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1388963) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1843 + ... + 2484.

It is an arithmetic number, because the mean of its divisors is an integer number (233712).

2^1388967 is an apocalyptic number.

1388967 is a deficient number, since it is larger than the sum of its proper divisors (480729).

1388967 is a wasteful number, since it uses less digits than its factorization.

1388967 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4437.

The product of its digits is 72576, while the sum is 42.

The square root of 1388967 is about 1178.5444412495. The cubic root of 1388967 is about 111.5742499139.

The spelling of 1388967 in words is "one million, three hundred eighty-eight thousand, nine hundred sixty-seven".