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1392 = 24329
BaseRepresentation
bin10101110000
31220120
4111300
521032
610240
74026
oct2560
91816
101392
111056
12980
13831
14716
1562c
hex570

1392 has 20 divisors (see below), whose sum is σ = 3720. Its totient is φ = 448.

The previous prime is 1381. The next prime is 1399. The reversal of 1392 is 2931.

It can be divided in two parts, 139 and 2, that added together give a palindrome (141).

It is a nialpdrome in base 12 and base 13.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1399) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (5) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 34 + ... + 62.

It is an arithmetic number, because the mean of its divisors is an integer number (186).

1392 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1392, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1860).

1392 is an abundant number, since it is smaller than the sum of its proper divisors (2328).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1392 is a wasteful number, since it uses less digits than its factorization.

1392 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40 (or 34 counting only the distinct ones).

The product of its digits is 54, while the sum is 15.

The square root of 1392 is about 37.3095162124. The cubic root of 1392 is about 11.1655403433.

The spelling of 1392 in words is "one thousand, three hundred ninety-two".

Divisors: 1 2 3 4 6 8 12 16 24 29 48 58 87 116 174 232 348 464 696 1392