Search a number
-
+
72290 = 257229
BaseRepresentation
bin10001101001100010
310200011102
4101221202
54303130
61314402
7420521
oct215142
9120142
1072290
114a349
1235a02
1326b9a
141c4b8
1516645
hex11a62

72290 has 8 divisors (see below), whose sum is σ = 130140. Its totient is φ = 28912.

The previous prime is 72287. The next prime is 72307. The reversal of 72290 is 9227.

It can be written as a sum of positive squares in 2 ways, for example, as 66049 + 6241 = 257^2 + 79^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-3 number, since 3×722903 = 1133328809967000, which contains 333 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3605 + ... + 3624.

272290 is an apocalyptic number.

72290 is a deficient number, since it is larger than the sum of its proper divisors (57850).

72290 is a wasteful number, since it uses less digits than its factorization.

72290 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7236.

The product of its (nonzero) digits is 252, while the sum is 20.

The square root of 72290 is about 268.8679973519. The cubic root of 72290 is about 41.6574557417.

It can be divided in two parts, 722 and 90, that multiplied together give a triangular number (64980 = T360).

The spelling of 72290 in words is "seventy-two thousand, two hundred ninety".

Divisors: 1 2 5 10 7229 14458 36145 72290