40913618 has 4 divisors (see below), whose sum is σ = 61370430. Its totient is φ = 20456808.

The previous prime is 40913603. The next prime is 40913623. The reversal of 40913618 is 81631904.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 30946969 + 9966649 = 5563^2 + 3157^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10228403 + ... + 10228406.

Almost surely, 2^40913618 is an apocalyptic number.

40913618 is a deficient number, since it is larger than the sum of its proper divisors (20456812).

40913618 is a wasteful number, since it uses less digits than its factorization.

40913618 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20456811.

The product of its (nonzero) digits is 5184, while the sum is 32.

The square root of 40913618 is about 6396.3753798538. The cubic root of 40913618 is about 344.5793879940.

The spelling of 40913618 in words is "forty million, nine hundred thirteen thousand, six hundred eighteen".