40387873 has 4 divisors (see below), whose sum is σ = 40406320. Its totient is φ = 40369428.

The previous prime is 40387871. The next prime is 40387877. The reversal of 40387873 is 37878304.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 40387873 - 2¹ = 40387871 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (40387871) 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, 5415 + ... + 10492.

It is an arithmetic number, because the mean of its divisors is an integer number (10101580).

Almost surely, 2^40387873 is an apocalyptic number.

It is an amenable number.

40387873 is a deficient number, since it is larger than the sum of its proper divisors (18447).

40387873 is a wasteful number, since it uses less digits than its factorization.

40387873 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18446.

The product of its (nonzero) digits is 112896, while the sum is 40.

The square root of 40387873 is about 6355.1453956617. The cubic root of 40387873 is about 343.0970579312.

It can be divided in two parts, 4038 and 7873, that added together give a palindrome (11911).

The spelling of 40387873 in words is "forty million, three hundred eighty-seven thousand, eight hundred seventy-three".