40499538 has 16 divisors (see below), whose sum is σ = 81638400. Its totient is φ = 13393296.

The previous prime is 40499521. The next prime is 40499617. The reversal of 40499538 is 83599404.

It is a self number, because there is not a number n which added to its sum of digits gives 40499538.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 25813 + ... + 27336.

It is an arithmetic number, because the mean of its divisors is an integer number (5102400).

Almost surely, 2^40499538 is an apocalyptic number.

40499538 is an abundant number, since it is smaller than the sum of its proper divisors (41138862).

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

40499538 is a wasteful number, since it uses less digits than its factorization.

40499538 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 53281.

The product of its (nonzero) digits is 155520, while the sum is 42.

The square root of 40499538 is about 6363.9247324273. The cubic root of 40499538 is about 343.4129669389.

The spelling of 40499538 in words is "forty million, four hundred ninety-nine thousand, five hundred thirty-eight".