40436590 has 16 divisors (see below), whose sum is σ = 73116288. Its totient is φ = 16101216.

The previous prime is 40436581. The next prime is 40436593. The reversal of 40436590 is 9563404.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40436593) 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, 6837 + ... + 11296.

It is an arithmetic number, because the mean of its divisors is an integer number (4569768).

Almost surely, 2^40436590 is an apocalyptic number.

40436590 is a deficient number, since it is larger than the sum of its proper divisors (32679698).

40436590 is a wasteful number, since it uses less digits than its factorization.

40436590 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18363.

The product of its (nonzero) digits is 12960, while the sum is 31.

The square root of 40436590 is about 6358.9771190027. The cubic root of 40436590 is about 343.2349536415.

Adding to 40436590 its reverse (9563404), we get a palindrome (49999994).

The spelling of 40436590 in words is "forty million, four hundred thirty-six thousand, five hundred ninety".