40257844 has 12 divisors (see below), whose sum is σ = 76855968. Its totient is φ = 18299000.

The previous prime is 40257799. The next prime is 40257851. The reversal of 40257844 is 44875204.

It is a happy number.

It is a congruent number.

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 in 3 ways as a sum of consecutive naturals, for example, 457432 + ... + 457519.

It is an arithmetic number, because the mean of its divisors is an integer number (6404664).

Almost surely, 2^40257844 is an apocalyptic number.

40257844 is a gapful number since it is divisible by the number (44) formed by its first and last digit.

It is an amenable number.

40257844 is a deficient number, since it is larger than the sum of its proper divisors (36598124).

40257844 is a wasteful number, since it uses less digits than its factorization.

40257844 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 914966 (or 914964 counting only the distinct ones).

The product of its (nonzero) digits is 35840, while the sum is 34.

The square root of 40257844 is about 6344.9069339116. The cubic root of 40257844 is about 342.7284610674.

The spelling of 40257844 in words is "forty million, two hundred fifty-seven thousand, eight hundred forty-four".