40745557 has 4 divisors (see below), whose sum is σ = 42890080. Its totient is φ = 38601036.

The previous prime is 40745539. The next prime is 40745561. The reversal of 40745557 is 75554704.

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 40745557 - 2²³ = 32356949 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40745527) 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, 1072233 + ... + 1072270.

It is an arithmetic number, because the mean of its divisors is an integer number (10722520).

Almost surely, 2^40745557 is an apocalyptic number.

It is an amenable number.

40745557 is a deficient number, since it is larger than the sum of its proper divisors (2144523).

40745557 is a wasteful number, since it uses less digits than its factorization.

40745557 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2144522.

The product of its (nonzero) digits is 98000, while the sum is 37.

The square root of 40745557 is about 6383.2246552977. The cubic root of 40745557 is about 344.1069305445.

The spelling of 40745557 in words is "forty million, seven hundred forty-five thousand, five hundred fifty-seven".