40040457 has 8 divisors (see below), whose sum is σ = 56527776. Its totient is φ = 25123392.

The previous prime is 40040411. The next prime is 40040471. The reversal of 40040457 is 75404004.

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

It is not a de Polignac number, because 40040457 - 2⁶ = 40040393 is a prime.

It is not an unprimeable number, because it can be changed into a prime (40040257) 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, 392503 + ... + 392604.

It is an arithmetic number, because the mean of its divisors is an integer number (7065972).

Almost surely, 2^40040457 is an apocalyptic number.

It is an amenable number.

40040457 is a deficient number, since it is larger than the sum of its proper divisors (16487319).

40040457 is a wasteful number, since it uses less digits than its factorization.

40040457 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 785127.

The product of its (nonzero) digits is 2240, while the sum is 24.

The square root of 40040457 is about 6327.7529186908. The cubic root of 40040457 is about 342.1104513126.

The spelling of 40040457 in words is "forty million, forty thousand, four hundred fifty-seven".