40287849 has 24 divisors (see below), whose sum is σ = 62818560. Its totient is φ = 22899744.

The previous prime is 40287833. The next prime is 40287851. The reversal of 40287849 is 94878204.

It is not a de Polignac number, because 40287849 - 2⁴ = 40287833 is a prime.

It is a super-2 number, since 2×40287849² = 3246221554093602, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 40287849.

It is not an unprimeable number, because it can be changed into a prime (40287869) 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, 32167 + ... + 33395.

It is an arithmetic number, because the mean of its divisors is an integer number (2617440).

Almost surely, 2^40287849 is an apocalyptic number.

40287849 is a gapful number since it is divisible by the number (49) formed by its first and last digit.

It is an amenable number.

40287849 is a deficient number, since it is larger than the sum of its proper divisors (22530711).

40287849 is a wasteful number, since it uses less digits than its factorization.

40287849 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1469 (or 1462 counting only the distinct ones).

The product of its (nonzero) digits is 129024, while the sum is 42.

The square root of 40287849 is about 6347.2709883855. The cubic root of 40287849 is about 342.8135874483.

The spelling of 40287849 in words is "forty million, two hundred eighty-seven thousand, eight hundred forty-nine".