40640575 has 12 divisors (see below), whose sum is σ = 50916880. Its totient is φ = 32175360.

The previous prime is 40640573. The next prime is 40640581. The reversal of 40640575 is 57504604.

It is a happy number.

It is not a de Polignac number, because 40640575 - 2¹ = 40640573 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40640573) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 5955 + ... + 10804.

Almost surely, 2^40640575 is an apocalyptic number.

40640575 is a deficient number, since it is larger than the sum of its proper divisors (10276305).

40640575 is a wasteful number, since it uses less digits than its factorization.

40640575 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16866 (or 16861 counting only the distinct ones).

The product of its (nonzero) digits is 16800, while the sum is 31.

The square root of 40640575 is about 6374.9960784302. The cubic root of 40640575 is about 343.8111428429.

The spelling of 40640575 in words is "forty million, six hundred forty thousand, five hundred seventy-five".