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1388 = 22347
BaseRepresentation
bin10101101100
31220102
4111230
521023
610232
74022
oct2554
91812
101388
111052
12978
1382a
14712
15628
hex56c

1388 has 6 divisors (see below), whose sum is σ = 2436. Its totient is φ = 692.

The previous prime is 1381. The next prime is 1399. The reversal of 1388 is 8831.

It can be divided in two parts, 13 and 88, that added together give a palindrome (101).

It is a plaindrome in base 10 and base 16.

It is not an unprimeable number, because it can be changed into a prime (1381) by changing a digit.

1388 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 170 + ... + 177.

It is an arithmetic number, because the mean of its divisors is an integer number (406).

It is an amenable number.

1388 is a deficient number, since it is larger than the sum of its proper divisors (1048).

1388 is a wasteful number, since it uses less digits than its factorization.

1388 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 351 (or 349 counting only the distinct ones).

The product of its digits is 192, while the sum is 20.

The square root of 1388 is about 37.2558720204. The cubic root of 1388 is about 11.1548351207.

The spelling of 1388 in words is "one thousand, three hundred eighty-eight".

Divisors: 1 2 4 347 694 1388