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71495444 = 2217873861
BaseRepresentation
bin1000100001011…
…10111100010100
311222112100022102
410100232330110
5121300323234
611032221232
71525462346
oct420567424
9158470272
1071495444
11373a2649
121bb3a818
1311a733c7
1496d1296
156423c7e
hex442ef14

71495444 has 6 divisors (see below), whose sum is σ = 125117034. Its totient is φ = 35747720.

The previous prime is 71495401. The next prime is 71495449. The reversal of 71495444 is 44459417.

It can be written as a sum of positive squares in only one way, i.e., 67043344 + 4452100 = 8188^2 + 2110^2 .

It is a super-3 number, since 3×714954443 (a number of 25 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a junction number, because it is equal to n+sod(n) for n = 71495398 and 71495407.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71495449) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8936927 + ... + 8936934.

It is an arithmetic number, because the mean of its divisors is an integer number (20852839).

Almost surely, 271495444 is an apocalyptic number.

It is an amenable number.

71495444 is a deficient number, since it is larger than the sum of its proper divisors (53621590).

71495444 is a wasteful number, since it uses less digits than its factorization.

71495444 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17873865 (or 17873863 counting only the distinct ones).

The product of its digits is 80640, while the sum is 38.

The square root of 71495444 is about 8455.4978564245. The cubic root of 71495444 is about 415.0427091091.

The spelling of 71495444 in words is "seventy-one million, four hundred ninety-five thousand, four hundred forty-four".

Divisors: 1 2 4 17873861 35747722 71495444