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71980544 = 29140587
BaseRepresentation
bin1000100101001…
…01011000000000
312000102222202002
410102211120000
5121411334134
611050443132
71532552546
oct422453000
9160388662
1071980544
11376a4059
12201334a8
1311bb314c
1497b9d96
1564bc87e
hex44a5600

71980544 has 20 divisors (see below), whose sum is σ = 143821524. Its totient is φ = 35990016.

The previous prime is 71980529. The next prime is 71980561. The reversal of 71980544 is 44508917.

It is a junction number, because it is equal to n+sod(n) for n = 71980498 and 71980507.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 69782 + ... + 70805.

Almost surely, 271980544 is an apocalyptic number.

It is an amenable number.

71980544 is a deficient number, since it is larger than the sum of its proper divisors (71840980).

71980544 is an equidigital number, since it uses as much as digits as its factorization.

71980544 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 140605 (or 140589 counting only the distinct ones).

The product of its (nonzero) digits is 40320, while the sum is 38.

The square root of 71980544 is about 8484.1348409841. The cubic root of 71980544 is about 415.9792889097.

The spelling of 71980544 in words is "seventy-one million, nine hundred eighty thousand, five hundred forty-four".

Divisors: 1 2 4 8 16 32 64 128 256 512 140587 281174 562348 1124696 2249392 4498784 8997568 17995136 35990272 71980544