1388919 has 24 divisors (see below), whose sum is σ = 2266240. Its totient is φ = 739152.

The previous prime is 1388887. The next prime is 1388927. The reversal of 1388919 is 9198831.

It is a happy number.

It is not a de Polignac number, because 1388919 - 2⁵ = 1388887 is a prime.

It is a super-2 number, since 2×1388919² = 3858191977122, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1388969) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 23512 + ... + 23570.

2^1388919 is an apocalyptic number.

1388919 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

1388919 is a deficient number, since it is larger than the sum of its proper divisors (877321).

1388919 is an equidigital number, since it uses as much as digits as its factorization.

1388919 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 147 (or 88 counting only the distinct ones).

The product of its digits is 15552, while the sum is 39.

The square root of 1388919 is about 1178.5240769709. The cubic root of 1388919 is about 111.5729646360.

The spelling of 1388919 in words is "one million, three hundred eighty-eight thousand, nine hundred nineteen".