40396387 has 2 divisors, whose sum is σ = 40396388. Its totient is φ = 40396386.

The previous prime is 40396361. The next prime is 40396397. The reversal of 40396387 is 78369304.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 40396387 - 2⁷ = 40396259 is a prime.

It is not a weakly prime, because it can be changed into another prime (40396397) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20198193 + 20198194.

It is an arithmetic number, because the mean of its divisors is an integer number (20198194).

Almost surely, 2^40396387 is an apocalyptic number.

40396387 is a deficient number, since it is larger than the sum of its proper divisors (1).

40396387 is an equidigital number, since it uses as much as digits as its factorization.

40396387 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 108864, while the sum is 40.

The square root of 40396387 is about 6355.8152112849. The cubic root of 40396387 is about 343.1211651933.

The spelling of 40396387 in words is "forty million, three hundred ninety-six thousand, three hundred eighty-seven".