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8213956 = 2214332
BaseRepresentation
bin11111010101010111000100
3120110022102121
4133111113010
54100321311
6452015324
7126550252
oct37252704
916408377
108213956
1147002a3
122901544
13191793a
14113b5d2
15ac3b71
hex7d55c4

8213956 has 9 divisors (see below), whose sum is σ = 14384461. Its totient is φ = 4104112.

The previous prime is 8213951. The next prime is 8213969. The reversal of 8213956 is 6593128.

The square root of 8213956 is 2866.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 6812100 + 1401856 = 2610^2 + 1184^2 .

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (8213951) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 5016 + ... + 6448.

Almost surely, 28213956 is an apocalyptic number.

8213956 is the 2866-th square number.

It is an amenable number.

8213956 is a deficient number, since it is larger than the sum of its proper divisors (6170505).

8213956 is an equidigital number, since it uses as much as digits as its factorization.

8213956 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2870 (or 1435 counting only the distinct ones).

The product of its digits is 12960, while the sum is 34.

The cubic root of 8213956 is about 201.7673038527.

The spelling of 8213956 in words is "eight million, two hundred thirteen thousand, nine hundred fifty-six".

Divisors: 1 2 4 1433 2866 5732 2053489 4106978 8213956