Search a number
-
+
86664442 = 243332221
BaseRepresentation
bin1010010101001…
…10010011111010
320001002000021011
411022212103322
5134141230232
612333304134
72101431004
oct512462372
9201060234
1086664442
1144a13307
122503504a
1314c54947
14b71d374
15791d547
hex52a64fa

86664442 has 4 divisors (see below), whose sum is σ = 129996666. Its totient is φ = 43332220.

The previous prime is 86664427. The next prime is 86664443. The reversal of 86664442 is 24446668.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 58690921 + 27973521 = 7661^2 + 5289^2 .

It is a nialpdrome in base 10.

It is a junction number, because it is equal to n+sod(n) for n = 86664395 and 86664404.

It is not an unprimeable number, because it can be changed into a prime (86664443) by changing a digit.

It is an upside-down number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21666109 + ... + 21666112.

Almost surely, 286664442 is an apocalyptic number.

86664442 is a deficient number, since it is larger than the sum of its proper divisors (43332224).

86664442 is a wasteful number, since it uses less digits than its factorization.

86664442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43332223.

The product of its digits is 221184, while the sum is 40.

The square root of 86664442 is about 9309.3738779791. The cubic root of 86664442 is about 442.5343448504.

The spelling of 86664442 in words is "eighty-six million, six hundred sixty-four thousand, four hundred forty-two".

Divisors: 1 2 43332221 86664442