40287285 has 24 divisors (see below), whose sum is σ = 70178784. Its totient is φ = 21379680.

The previous prime is 40287281. The next prime is 40287307. The reversal of 40287285 is 58278204.

It is a happy number.

It is not a de Polignac number, because 40287285 - 2² = 40287281 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40287281) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 7374 + ... + 11616.

It is an arithmetic number, because the mean of its divisors is an integer number (2924116).

Almost surely, 2^40287285 is an apocalyptic number.

40287285 is a gapful number since it is divisible by the number (45) formed by its first and last digit.

It is an amenable number.

40287285 is a deficient number, since it is larger than the sum of its proper divisors (29891499).

40287285 is a wasteful number, since it uses less digits than its factorization.

40287285 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4465 (or 4462 counting only the distinct ones).

The product of its (nonzero) digits is 35840, while the sum is 36.

The square root of 40287285 is about 6347.2265596873. The cubic root of 40287285 is about 342.8119877288.

The spelling of 40287285 in words is "forty million, two hundred eighty-seven thousand, two hundred eighty-five".