40287249 has 12 divisors (see below), whose sum is σ = 58270212. Its totient is φ = 26822400.

The previous prime is 40287241. The next prime is 40287271. The reversal of 40287249 is 94278204.

40287249 is a `hidden beast` number, since 402 + 8 + 7 + 249 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 6275025 + 34012224 = 2505^2 + 5832^2 .

It is not a de Polignac number, because 40287249 - 2³ = 40287241 is a prime.

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 11 ways as a sum of consecutive naturals, for example, 5389 + ... + 10469.

It is an arithmetic number, because the mean of its divisors is an integer number (4855851).

Almost surely, 2^40287249 is an apocalyptic number.

It is an amenable number.

40287249 is a deficient number, since it is larger than the sum of its proper divisors (17982963).

40287249 is a wasteful number, since it uses less digits than its factorization.

40287249 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5968 (or 5965 counting only the distinct ones).

The product of its (nonzero) digits is 32256, while the sum is 36.

The square root of 40287249 is about 6347.2237238024. The cubic root of 40287249 is about 342.8118856186.

The spelling of 40287249 in words is "forty million, two hundred eighty-seven thousand, two hundred forty-nine".