40138347 has 8 divisors (see below), whose sum is σ = 53593744. Its totient is φ = 26720928.

The previous prime is 40138339. The next prime is 40138387. The reversal of 40138347 is 74383104.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 40138347 - 2³ = 40138339 is a prime.

It is a super-2 number, since 2×40138347² = 3222173799784818, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (40138337) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6928 + ... + 11325.

It is an arithmetic number, because the mean of its divisors is an integer number (6699218).

Almost surely, 2^40138347 is an apocalyptic number.

40138347 is a deficient number, since it is larger than the sum of its proper divisors (13455397).

40138347 is a wasteful number, since it uses less digits than its factorization.

40138347 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18989.

The product of its (nonzero) digits is 8064, while the sum is 30.

The square root of 40138347 is about 6335.4831702089. The cubic root of 40138347 is about 342.3890190445.

The spelling of 40138347 in words is "forty million, one hundred thirty-eight thousand, three hundred forty-seven".