40257635 has 8 divisors (see below), whose sum is σ = 52700976. Its totient is φ = 29278240.

The previous prime is 40257631. The next prime is 40257641. The reversal of 40257635 is 53675204.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 40257635 - 2² = 40257631 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (40257631) 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 7 ways as a sum of consecutive naturals, for example, 365924 + ... + 366033.

It is an arithmetic number, because the mean of its divisors is an integer number (6587622).

Almost surely, 2^40257635 is an apocalyptic number.

40257635 is a deficient number, since it is larger than the sum of its proper divisors (12443341).

40257635 is a wasteful number, since it uses less digits than its factorization.

40257635 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 731973.

The product of its (nonzero) digits is 25200, while the sum is 32.

The square root of 40257635 is about 6344.8904639875. The cubic root of 40257635 is about 342.7278679708.

Subtracting 40257635 from its reverse (53675204), we obtain a square (13417569 = 3663²).

The spelling of 40257635 in words is "forty million, two hundred fifty-seven thousand, six hundred thirty-five".