40906057 has 4 divisors (see below), whose sum is σ = 41599440. Its totient is φ = 40212676.

The previous prime is 40906049. The next prime is 40906079. The reversal of 40906057 is 75060904.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 40906057 - 2³ = 40906049 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (40906357) 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 3 ways as a sum of consecutive naturals, for example, 346603 + ... + 346720.

It is an arithmetic number, because the mean of its divisors is an integer number (10399860).

Almost surely, 2^40906057 is an apocalyptic number.

It is an amenable number.

40906057 is a deficient number, since it is larger than the sum of its proper divisors (693383).

40906057 is an equidigital number, since it uses as much as digits as its factorization.

40906057 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 693382.

The product of its (nonzero) digits is 7560, while the sum is 31.

The square root of 40906057 is about 6395.7843146873. The cubic root of 40906057 is about 344.5581601372.

The spelling of 40906057 in words is "forty million, nine hundred six thousand, fifty-seven".