40312577 has 4 divisors (see below), whose sum is σ = 40353540. Its totient is φ = 40271616.

The previous prime is 40312561. The next prime is 40312589. The reversal of 40312577 is 77521304.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 21381376 + 18931201 = 4624^2 + 4351^2 .

It is a cyclic number.

It is not a de Polignac number, because 40312577 - 2⁴ = 40312561 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (40312507) 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, 18968 + ... + 20985.

It is an arithmetic number, because the mean of its divisors is an integer number (10088385).

Almost surely, 2^40312577 is an apocalyptic number.

It is an amenable number.

40312577 is a deficient number, since it is larger than the sum of its proper divisors (40963).

40312577 is a wasteful number, since it uses less digits than its factorization.

40312577 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40962.

The product of its (nonzero) digits is 5880, while the sum is 29.

The square root of 40312577 is about 6349.2186133413. The cubic root of 40312577 is about 342.8837108298.

The spelling of 40312577 in words is "forty million, three hundred twelve thousand, five hundred seventy-seven".