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87215088 = 24312171493
BaseRepresentation
bin1010011001011…
…00101111110000
320002002222121110
411030230233300
5134311340323
612353153320
72106213252
oct514545760
9202088543
1087215088
1145259a94
122525b840
13150b847c
14b823cd2
1579cb793
hex532cbf0

87215088 has 40 divisors (see below), whose sum is σ = 225641808. Its totient is φ = 29028352.

The previous prime is 87215081. The next prime is 87215099. The reversal of 87215088 is 88051278.

It is a Smith number, since the sum of its digits (39) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (87215081) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 57670 + ... + 59162.

Almost surely, 287215088 is an apocalyptic number.

It is an amenable number.

87215088 is an abundant number, since it is smaller than the sum of its proper divisors (138426720).

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

87215088 is a wasteful number, since it uses less digits than its factorization.

87215088 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2721 (or 2715 counting only the distinct ones).

The product of its (nonzero) digits is 35840, while the sum is 39.

The square root of 87215088 is about 9338.9018626389. The cubic root of 87215088 is about 443.4696207266.

The spelling of 87215088 in words is "eighty-seven million, two hundred fifteen thousand, eighty-eight".

Divisors: 1 2 3 4 6 8 12 16 24 48 1217 1493 2434 2986 3651 4479 4868 5972 7302 8958 9736 11944 14604 17916 19472 23888 29208 35832 58416 71664 1816981 3633962 5450943 7267924 10901886 14535848 21803772 29071696 43607544 87215088