40020006257 has 8 divisors (see below), whose sum is σ = 49895072832. Its totient is φ = 31184420400.

The previous prime is 40020006253. The next prime is 40020006287. The reversal of 40020006257 is 75260002004.

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

It is not a de Polignac number, because 40020006257 - 2² = 40020006253 is a prime.

It is not an unprimeable number, because it can be changed into a prime (40020006253) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 259870094 + ... + 259870247.

It is an arithmetic number, because the mean of its divisors is an integer number (6236884104).

Almost surely, 2^40020006257 is an apocalyptic number.

It is an amenable number.

40020006257 is a deficient number, since it is larger than the sum of its proper divisors (9875066575).

40020006257 is a wasteful number, since it uses less digits than its factorization.

40020006257 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 519740359.

The product of its (nonzero) digits is 3360, while the sum is 26.

The spelling of 40020006257 in words is "forty billion, twenty million, six thousand, two hundred fifty-seven".