40387679 has 4 divisors (see below), whose sum is σ = 40420584. Its totient is φ = 40354776.

The previous prime is 40387663. The next prime is 40387687. The reversal of 40387679 is 97678304.

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

It is a cyclic number.

It is not a de Polignac number, because 40387679 - 2⁴ = 40387663 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40387649) 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, 14537 + ... + 17090.

It is an arithmetic number, because the mean of its divisors is an integer number (10105146).

Almost surely, 2^40387679 is an apocalyptic number.

40387679 is a deficient number, since it is larger than the sum of its proper divisors (32905).

40387679 is a wasteful number, since it uses less digits than its factorization.

40387679 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32904.

The product of its (nonzero) digits is 254016, while the sum is 44.

The square root of 40387679 is about 6355.1301324206. The cubic root of 40387679 is about 343.0965085837.

The spelling of 40387679 in words is "forty million, three hundred eighty-seven thousand, six hundred seventy-nine".