1388836 has 6 divisors (see below), whose sum is σ = 2430470. Its totient is φ = 694416.

The previous prime is 1388819. The next prime is 1388837. The reversal of 1388836 is 6388831.

It can be written as a sum of positive squares in only one way, i.e., 732736 + 656100 = 856^2 + 810^2 .

It is a junction number, because it is equal to n+sod(n) for n = 1388795 and 1388804.

It is not an unprimeable number, because it can be changed into a prime (1388837) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 173601 + ... + 173608.

2^1388836 is an apocalyptic number.

It is an amenable number.

1388836 is a deficient number, since it is larger than the sum of its proper divisors (1041634).

1388836 is a wasteful number, since it uses less digits than its factorization.

1388836 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 347213 (or 347211 counting only the distinct ones).

The product of its digits is 27648, while the sum is 37.

The square root of 1388836 is about 1178.4888629088. The cubic root of 1388836 is about 111.5707421065.

It can be divided in two parts, 13888 and 36, that added together give a square (13924 = 118²).

The spelling of 1388836 in words is "one million, three hundred eighty-eight thousand, eight hundred thirty-six".