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1388144 = 24101859
BaseRepresentation
bin101010010111001110000
32121112011202
411102321300
5323410034
645430332
714541032
oct5227160
92545152
101388144
11868a2a
1256b3a8
13397ab4
14281c52
151c647e
hex152e70

1388144 has 20 divisors (see below), whose sum is σ = 2719320. Its totient is φ = 686400.

The previous prime is 1388141. The next prime is 1388161. The reversal of 1388144 is 4418831.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1388141) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1187 + ... + 2045.

It is an arithmetic number, because the mean of its divisors is an integer number (135966).

21388144 is an apocalyptic number.

It is an amenable number.

1388144 is a deficient number, since it is larger than the sum of its proper divisors (1331176).

1388144 is a wasteful number, since it uses less digits than its factorization.

1388144 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 968 (or 962 counting only the distinct ones).

The product of its digits is 3072, while the sum is 29.

The square root of 1388144 is about 1178.1952300022. The cubic root of 1388144 is about 111.5522086535.

The spelling of 1388144 in words is "one million, three hundred eighty-eight thousand, one hundred forty-four".

Divisors: 1 2 4 8 16 101 202 404 808 859 1616 1718 3436 6872 13744 86759 173518 347036 694072 1388144