40089915 has 12 divisors (see below), whose sum is σ = 69489264. Its totient is φ = 21381264.

The previous prime is 40089911. The next prime is 40089947. The reversal of 40089915 is 51998004.

It is not a de Polignac number, because 40089915 - 2² = 40089911 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 40089915.

It is not an unprimeable number, because it can be changed into a prime (40089911) 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, 445399 + ... + 445488.

It is an arithmetic number, because the mean of its divisors is an integer number (5790772).

Almost surely, 2^40089915 is an apocalyptic number.

40089915 is a gapful number since it is divisible by the number (45) formed by its first and last digit.

40089915 is a deficient number, since it is larger than the sum of its proper divisors (29399349).

40089915 is a wasteful number, since it uses less digits than its factorization.

40089915 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 890898 (or 890895 counting only the distinct ones).

The product of its (nonzero) digits is 12960, while the sum is 36.

The square root of 40089915 is about 6331.6597350142. The cubic root of 40089915 is about 342.2512517111.

The spelling of 40089915 in words is "forty million, eighty-nine thousand, nine hundred fifteen".