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87938248 = 2310992281
BaseRepresentation
bin1010011110111…
…01010011001000
320010110201121011
411033131103020
5140003010443
612420453304
72115314506
oct517352310
9203421534
1087938248
1145703342
122554a234
13152ac688
14b971676
157ac0b9d
hex53dd4c8

87938248 has 8 divisors (see below), whose sum is σ = 164884230. Its totient is φ = 43969120.

The previous prime is 87938243. The next prime is 87938267. The reversal of 87938248 is 84283978.

It can be written as a sum of positive squares in only one way, i.e., 78464164 + 9474084 = 8858^2 + 3078^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a super-2 number, since 2×879382482 = 15466270922619008, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (87938243) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5496133 + ... + 5496148.

Almost surely, 287938248 is an apocalyptic number.

It is an amenable number.

87938248 is a deficient number, since it is larger than the sum of its proper divisors (76945982).

87938248 is a wasteful number, since it uses less digits than its factorization.

87938248 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10992287 (or 10992283 counting only the distinct ones).

The product of its digits is 774144, while the sum is 49.

The square root of 87938248 is about 9377.5395493701. The cubic root of 87938248 is about 444.6919519358.

The spelling of 87938248 in words is "eighty-seven million, nine hundred thirty-eight thousand, two hundred forty-eight".

Divisors: 1 2 4 8 10992281 21984562 43969124 87938248