40387 has 2 divisors, whose sum is σ = 40388. Its totient is φ = 40386.
The previous prime is 40361. The next prime is 40423. The reversal of 40387 is 78304.
It is a weak prime.
It is a cyclic number.
It is a de Polignac number, because none of the positive numbers 2k-40387 is a prime.
It is a super-2 number, since 2×403872 = 3262219538, which contains 22 as substring.
It is a Chen prime.
It is not a weakly prime, because it can be changed into another prime (40357) by changing a digit.
It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20193 + 20194.
It is an arithmetic number, because the mean of its divisors is an integer number (20194).
240387 is an apocalyptic number.
40387 is a deficient number, since it is larger than the sum of its proper divisors (1).
40387 is an equidigital number, since it uses as much as digits as its factorization.
40387 is an odious number, because the sum of its binary digits is odd.
The product of its (nonzero) digits is 672, while the sum is 22.
The square root of 40387 is about 200.9651711118. The cubic root of 40387 is about 34.3094585853.
The spelling of 40387 in words is "forty thousand, three hundred eighty-seven".
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