40249215 has 12 divisors (see below), whose sum is σ = 69765384. Its totient is φ = 21466224.

The previous prime is 40249211. The next prime is 40249243. The reversal of 40249215 is 51294204.

40249215 is a `hidden beast` number, since 402 + 49 + 215 = 666.

It is not a de Polignac number, because 40249215 - 2² = 40249211 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40249211) 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, 447169 + ... + 447258.

It is an arithmetic number, because the mean of its divisors is an integer number (5813782).

Almost surely, 2^40249215 is an apocalyptic number.

40249215 is a gapful number since it is divisible by the number (45) formed by its first and last digit.

40249215 is a deficient number, since it is larger than the sum of its proper divisors (29516169).

40249215 is a wasteful number, since it uses less digits than its factorization.

40249215 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 894438 (or 894435 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 27.

The square root of 40249215 is about 6344.2269032562. The cubic root of 40249215 is about 342.7039721321.

The spelling of 40249215 in words is "forty million, two hundred forty-nine thousand, two hundred fifteen".