40542644 has 12 divisors (see below), whose sum is σ = 70998564. Its totient is φ = 20257344.

The previous prime is 40542641. The next prime is 40542647. The reversal of 40542644 is 44624504.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (40542641) and next prime (40542647).

It can be written as a sum of positive squares in 2 ways, for example, as 19272100 + 21270544 = 4390^2 + 4612^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40542641) 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, 5744 + ... + 10680.

It is an arithmetic number, because the mean of its divisors is an integer number (5916547).

Almost surely, 2^40542644 is an apocalyptic number.

It is an amenable number.

40542644 is a deficient number, since it is larger than the sum of its proper divisors (30455920).

40542644 is a wasteful number, since it uses less digits than its factorization.

40542644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6994 (or 6992 counting only the distinct ones).

The product of its (nonzero) digits is 15360, while the sum is 29.

The square root of 40542644 is about 6367.3105782583. The cubic root of 40542644 is about 343.5347618303.

The spelling of 40542644 in words is "forty million, five hundred forty-two thousand, six hundred forty-four".