40836387 has 4 divisors (see below), whose sum is σ = 54448520. Its totient is φ = 27224256.

The previous prime is 40836371. The next prime is 40836407. The reversal of 40836387 is 78363804.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 40836387 - 2⁴ = 40836371 is a prime.

It is a super-2 number, since 2×40836387² = 3335221006427538, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (40836337) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6806062 + ... + 6806067.

It is an arithmetic number, because the mean of its divisors is an integer number (13612130).

Almost surely, 2^40836387 is an apocalyptic number.

40836387 is a deficient number, since it is larger than the sum of its proper divisors (13612133).

40836387 is a wasteful number, since it uses less digits than its factorization.

40836387 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13612132.

The product of its (nonzero) digits is 96768, while the sum is 39.

The square root of 40836387 is about 6390.3354372052. The cubic root of 40836387 is about 344.3624351835.

The spelling of 40836387 in words is "forty million, eight hundred thirty-six thousand, three hundred eighty-seven".