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71242948 = 2272544391
BaseRepresentation
bin1000011111100…
…01010011000100
311222001111221201
410033301103010
5121214233243
611022552244
71523361250
oct417612304
9158044851
1071242948
113723a977
121ba38684
13119b54ba
149667260
1563c404d
hex43f14c4

71242948 has 12 divisors (see below), whose sum is σ = 142485952. Its totient is φ = 30532680.

The previous prime is 71242943. The next prime is 71242961. The reversal of 71242948 is 84924217.

71242948 is an admirable number.

It is a hoax number, since the sum of its digits (37) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (71242943) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1272168 + ... + 1272223.

Almost surely, 271242948 is an apocalyptic number.

It is an amenable number.

71242948 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

71242948 is a wasteful number, since it uses less digits than its factorization.

71242948 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2544402 (or 2544400 counting only the distinct ones).

The product of its digits is 32256, while the sum is 37.

The square root of 71242948 is about 8440.5537733018. The cubic root of 71242948 is about 414.5535393172.

It can be divided in two parts, 712 and 42948, that added together give a triangular number (43660 = T295).

The spelling of 71242948 in words is "seventy-one million, two hundred forty-two thousand, nine hundred forty-eight".

Divisors: 1 2 4 7 14 28 2544391 5088782 10177564 17810737 35621474 71242948