40615387 has 2 divisors, whose sum is σ = 40615388. Its totient is φ = 40615386.

The previous prime is 40615361. The next prime is 40615391. The reversal of 40615387 is 78351604.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-40615387 is a prime.

It is a super-2 number, since 2×40615387² = 3299219322319538, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (40615327) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20307693 + 20307694.

It is an arithmetic number, because the mean of its divisors is an integer number (20307694).

Almost surely, 2^40615387 is an apocalyptic number.

40615387 is a deficient number, since it is larger than the sum of its proper divisors (1).

40615387 is an equidigital number, since it uses as much as digits as its factorization.

40615387 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 20160, while the sum is 34.

The square root of 40615387 is about 6373.0202416123. The cubic root of 40615387 is about 343.7400996818.

The spelling of 40615387 in words is "forty million, six hundred fifteen thousand, three hundred eighty-seven".