40498638 has 16 divisors (see below), whose sum is σ = 81241680. Its totient is φ = 13458816.

The previous prime is 40498637. The next prime is 40498643. The reversal of 40498638 is 83689404.

It is a self number, because there is not a number n which added to its sum of digits gives 40498638.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40498637) 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, 7993 + ... + 12036.

It is an arithmetic number, because the mean of its divisors is an integer number (5077605).

Almost surely, 2^40498638 is an apocalyptic number.

40498638 is an abundant number, since it is smaller than the sum of its proper divisors (40743042).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

40498638 is a wasteful number, since it uses less digits than its factorization.

40498638 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20371.

The product of its (nonzero) digits is 165888, while the sum is 42.

The square root of 40498638 is about 6363.8540209530. The cubic root of 40498638 is about 343.4104230912.

The spelling of 40498638 in words is "forty million, four hundred ninety-eight thousand, six hundred thirty-eight".