40640307 has 8 divisors (see below), whose sum is σ = 55508880. Its totient is φ = 26432640.

The previous prime is 40640239. The next prime is 40640311. The reversal of 40640307 is 70304604.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 40640307 - 2⁸ = 40640051 is a prime.

It is not an unprimeable number, because it can be changed into a prime (40640317) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 165082 + ... + 165327.

It is an arithmetic number, because the mean of its divisors is an integer number (6938610).

Almost surely, 2^40640307 is an apocalyptic number.

40640307 is a deficient number, since it is larger than the sum of its proper divisors (14868573).

40640307 is a wasteful number, since it uses less digits than its factorization.

40640307 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 330453.

The product of its (nonzero) digits is 2016, while the sum is 24.

The square root of 40640307 is about 6374.9750587747. The cubic root of 40640307 is about 343.8103870991.

The spelling of 40640307 in words is "forty million, six hundred forty thousand, three hundred seven".