40857345 has 16 divisors (see below), whose sum is σ = 72635520. Its totient is φ = 21790512.

The previous prime is 40857343. The next prime is 40857347. The reversal of 40857345 is 54375804.

40857345 is a `hidden beast` number, since 40 + 8 + 573 + 45 = 666.

It is an interprime number because it is at equal distance from previous prime (40857343) and next prime (40857347).

It is not a de Polignac number, because 40857345 - 2¹ = 40857343 is a prime.

It is a Smith number, since the sum of its digits (36) coincides with the sum of the digits of its prime factors.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (40857343) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 151189 + ... + 151458.

It is an arithmetic number, because the mean of its divisors is an integer number (4539720).

Almost surely, 2^40857345 is an apocalyptic number.

40857345 is a gapful number since it is divisible by the number (45) formed by its first and last digit.

It is an amenable number.

40857345 is a deficient number, since it is larger than the sum of its proper divisors (31778175).

40857345 is a wasteful number, since it uses less digits than its factorization.

40857345 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 302661 (or 302655 counting only the distinct ones).

The product of its (nonzero) digits is 67200, while the sum is 36.

The square root of 40857345 is about 6391.9750468850. The cubic root of 40857345 is about 344.4213361959.

The spelling of 40857345 in words is "forty million, eight hundred fifty-seven thousand, three hundred forty-five".