40020057 has 96 divisors (see below), whose sum is σ = 79073280. Its totient is φ = 18869760.

The previous prime is 40020041. The next prime is 40020067. The reversal of 40020057 is 75002004.

It is a happy number.

It is not a de Polignac number, because 40020057 - 2⁴ = 40020041 is a prime.

It is not an unprimeable number, because it can be changed into a prime (40020017) 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 95 ways as a sum of consecutive naturals, for example, 506544 + ... + 506622.

It is an arithmetic number, because the mean of its divisors is an integer number (823680).

Almost surely, 2^40020057 is an apocalyptic number.

It is an amenable number.

40020057 is a deficient number, since it is larger than the sum of its proper divisors (39053223).

40020057 is a wasteful number, since it uses less digits than its factorization.

40020057 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 163 (or 160 counting only the distinct ones).

The product of its (nonzero) digits is 280, while the sum is 18.

The square root of 40020057 is about 6326.1407666918. The cubic root of 40020057 is about 342.0523414298.

The spelling of 40020057 in words is "forty million, twenty thousand, fifty-seven".