40648057 has 4 divisors (see below), whose sum is σ = 40687360. Its totient is φ = 40608756.

The previous prime is 40648051. The next prime is 40648063. The reversal of 40648057 is 75084604.

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 an interprime number because it is at equal distance from previous prime (40648051) and next prime (40648063).

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-40648057 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (40648051) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 18057 + ... + 20182.

It is an arithmetic number, because the mean of its divisors is an integer number (10171840).

Almost surely, 2^40648057 is an apocalyptic number.

It is an amenable number.

40648057 is a deficient number, since it is larger than the sum of its proper divisors (39303).

40648057 is a wasteful number, since it uses less digits than its factorization.

40648057 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39302.

The product of its (nonzero) digits is 26880, while the sum is 34.

The square root of 40648057 is about 6375.5828753142. The cubic root of 40648057 is about 343.8322402898.

It can be divided in two parts, 4064 and 8057, that added together give a palindrome (12121).

The spelling of 40648057 in words is "forty million, six hundred forty-eight thousand, fifty-seven".