40618438 has 8 divisors (see below), whose sum is σ = 69631632. Its totient is φ = 17407896.

The previous prime is 40618433. The next prime is 40618439. The reversal of 40618438 is 83481604.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40618433) 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, 1450645 + ... + 1450672.

It is an arithmetic number, because the mean of its divisors is an integer number (8703954).

Almost surely, 2^40618438 is an apocalyptic number.

40618438 is a deficient number, since it is larger than the sum of its proper divisors (29013194).

40618438 is a wasteful number, since it uses less digits than its factorization.

40618438 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2901326.

The product of its (nonzero) digits is 18432, while the sum is 34.

The square root of 40618438 is about 6373.2596055708. The cubic root of 40618438 is about 343.7487066398.

The spelling of 40618438 in words is "forty million, six hundred eighteen thousand, four hundred thirty-eight".