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87041740 = 2257161297
BaseRepresentation
bin1010011000000…
…10011011001100
320001210011211011
411030002123030
5134240313430
612345335004
72104562002
oct514023314
9201704734
1087041740
1145150825
1225197464
13150575b6
14b7baa72
15799522a
hex53026cc

87041740 has 24 divisors (see below), whose sum is σ = 185365152. Its totient is φ = 34325760.

The previous prime is 87041737. The next prime is 87041749. The reversal of 87041740 is 4714078.

It is not an unprimeable number, because it can be changed into a prime (87041749) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 29229 + ... + 32068.

It is an arithmetic number, because the mean of its divisors is an integer number (7723548).

Almost surely, 287041740 is an apocalyptic number.

It is an amenable number.

87041740 is an abundant number, since it is smaller than the sum of its proper divisors (98323412).

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

87041740 is a wasteful number, since it uses less digits than its factorization.

87041740 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 61377 (or 61375 counting only the distinct ones).

The product of its (nonzero) digits is 6272, while the sum is 31.

The square root of 87041740 is about 9329.6162836421. The cubic root of 87041740 is about 443.1756136473.

The spelling of 87041740 in words is "eighty-seven million, forty-one thousand, seven hundred forty".

Divisors: 1 2 4 5 10 20 71 142 284 355 710 1420 61297 122594 245188 306485 612970 1225940 4352087 8704174 17408348 21760435 43520870 87041740