40257345 has 8 divisors (see below), whose sum is σ = 64411776. Its totient is φ = 21470576.

The previous prime is 40257341. The next prime is 40257353. The reversal of 40257345 is 54375204.

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

It is a cyclic number.

It is not a de Polignac number, because 40257345 - 2² = 40257341 is a prime.

It is not an unprimeable number, because it can be changed into a prime (40257341) 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, 1341897 + ... + 1341926.

It is an arithmetic number, because the mean of its divisors is an integer number (8051472).

Almost surely, 2^40257345 is an apocalyptic number.

It is an amenable number.

40257345 is a deficient number, since it is larger than the sum of its proper divisors (24154431).

40257345 is a wasteful number, since it uses less digits than its factorization.

40257345 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2683831.

The product of its (nonzero) digits is 16800, while the sum is 30.

The square root of 40257345 is about 6344.8676109120. The cubic root of 40257345 is about 342.7270450104.

The spelling of 40257345 in words is "forty million, two hundred fifty-seven thousand, three hundred forty-five".