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31444 = 2271123
BaseRepresentation
bin111101011010100
31121010121
413223110
52001234
6401324
7160450
oct75324
947117
1031444
1121696
1216244
131140a
14b660
1594b4
hex7ad4

31444 has 12 divisors (see below), whose sum is σ = 62944. Its totient is φ = 13464.

The previous prime is 31397. The next prime is 31469. The reversal of 31444 is 44413.

31444 is an admirable number.

It is a hoax number, since the sum of its digits (16) coincides with the sum of the digits of its distinct prime factors.

It is a nialpdrome in base 14.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 534 + ... + 589.

231444 is an apocalyptic number.

It is an amenable number.

31444 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

It is a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (31472).

31444 is a wasteful number, since it uses less digits than its factorization.

31444 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1134 (or 1132 counting only the distinct ones).

The product of its digits is 192, while the sum is 16.

The square root of 31444 is about 177.3245611865. The cubic root of 31444 is about 31.5630717473.

Adding to 31444 its reverse (44413), we get a palindrome (75857).

The spelling of 31444 in words is "thirty-one thousand, four hundred forty-four".

Divisors: 1 2 4 7 14 28 1123 2246 4492 7861 15722 31444