1388774 has 4 divisors (see below), whose sum is σ = 2083164. Its totient is φ = 694386.

The previous prime is 1388773. The next prime is 1388789. The reversal of 1388774 is 4778831.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1388773) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 347192 + ... + 347195.

It is an arithmetic number, because the mean of its divisors is an integer number (520791).

2^1388774 is an apocalyptic number.

1388774 is a deficient number, since it is larger than the sum of its proper divisors (694390).

1388774 is an equidigital number, since it uses as much as digits as its factorization.

1388774 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 694389.

The product of its digits is 37632, while the sum is 38.

The square root of 1388774 is about 1178.4625577421. The cubic root of 1388774 is about 111.5690818459.

The spelling of 1388774 in words is "one million, three hundred eighty-eight thousand, seven hundred seventy-four".