Search a number
3956 = 222343
BaseRepresentation
bin111101110100
312102112
4331310
5111311
630152
714351
oct7564
95375
103956
112a77
122358
131a54
141628
15128b
hexf74

3956 has 12 divisors (see below), whose sum is σ = 7392. Its totient is φ = 1848.

The previous prime is 3947. The next prime is 3967. The reversal of 3956 is 6593.

It is a Harshad number since it is a multiple of its sum of digits (23).

It is a plaindrome in base 12 and base 15.

It is a nialpdrome in base 16.

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, 71 + ... + 113.

It is an arithmetic number, because the mean of its divisors is an integer number (616).

23956 is an apocalyptic number.

It is an amenable number.

3956 is a deficient number, since it is larger than the sum of its proper divisors (3436).

3956 is a wasteful number, since it uses less digits than its factorization.

3956 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 70 (or 68 counting only the distinct ones).

The product of its digits is 810, while the sum is 23.

The square root of 3956 is about 62.8967407741. The cubic root of 3956 is about 15.8155910833.

It can be divided in two parts, 3 and 956, that added together give a palindrome (959).

The spelling of 3956 in words is "three thousand, nine hundred fifty-six".

Divisors: 1 2 4 23 43 46 86 92 172 989 1978 3956