40257613 has 16 divisors (see below), whose sum is σ = 46956672. Its totient is φ = 34144000.

The previous prime is 40257601. The next prime is 40257631. The reversal of 40257613 is 31675204.

It is a de Polignac number, because none of the positive numbers 2^k-40257613 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40257013) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 8433 + ... + 12313.

It is an arithmetic number, because the mean of its divisors is an integer number (2934792).

Almost surely, 2^40257613 is an apocalyptic number.

It is an amenable number.

40257613 is a deficient number, since it is larger than the sum of its proper divisors (6699059).

40257613 is a wasteful number, since it uses less digits than its factorization.

40257613 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3956.

The product of its (nonzero) digits is 5040, while the sum is 28.

The square root of 40257613 is about 6344.8887303088. Note that the first 3 decimals coincide. The cubic root of 40257613 is about 342.7278055395.

The spelling of 40257613 in words is "forty million, two hundred fifty-seven thousand, six hundred thirteen".