40438534 has 8 divisors (see below), whose sum is σ = 60725088. Its totient is φ = 20196840.

The previous prime is 40438511. The next prime is 40438537. The reversal of 40438534 is 43583404.

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

It is a junction number, because it is equal to n+sod(n) for n = 40438496 and 40438505.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40438537) 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, 8862 + ... + 12625.

It is an arithmetic number, because the mean of its divisors is an integer number (7590636).

Almost surely, 2^40438534 is an apocalyptic number.

40438534 is a deficient number, since it is larger than the sum of its proper divisors (20286554).

40438534 is a wasteful number, since it uses less digits than its factorization.

40438534 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22430.

The product of its (nonzero) digits is 23040, while the sum is 31.

The square root of 40438534 is about 6359.1299719380. The cubic root of 40438534 is about 343.2404539245.

The spelling of 40438534 in words is "forty million, four hundred thirty-eight thousand, five hundred thirty-four".