40287247 has 32 divisors (see below), whose sum is σ = 54641664. Its totient is φ = 28684800.

The previous prime is 40287241. The next prime is 40287271. The reversal of 40287247 is 74278204.

It is a cyclic number.

It is not a de Polignac number, because 40287247 - 2¹¹ = 40285199 is a prime.

It is a Smith number, since the sum of its digits (34) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40287241) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 167047 + ... + 167287.

It is an arithmetic number, because the mean of its divisors is an integer number (1707552).

Almost surely, 2^40287247 is an apocalyptic number.

40287247 is a deficient number, since it is larger than the sum of its proper divisors (14354417).

40287247 is a wasteful number, since it uses less digits than its factorization.

40287247 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 439.

The product of its (nonzero) digits is 25088, while the sum is 34.

The square root of 40287247 is about 6347.2235662532. The cubic root of 40287247 is about 342.8118799458.

The spelling of 40287247 in words is "forty million, two hundred eighty-seven thousand, two hundred forty-seven".