40648815 has 24 divisors (see below), whose sum is σ = 70609968. Its totient is φ = 21632640.

The previous prime is 40648757. The next prime is 40648823. The reversal of 40648815 is 51884604.

40648815 is a `hidden beast` number, since 4 + 0 + 648 + 8 + 1 + 5 = 666.

It is not a de Polignac number, because 40648815 - 2¹³ = 40640623 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 40648815.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 33652 + ... + 34838.

It is an arithmetic number, because the mean of its divisors is an integer number (2942082).

Almost surely, 2^40648815 is an apocalyptic number.

40648815 is a gapful number since it is divisible by the number (45) formed by its first and last digit.

40648815 is a deficient number, since it is larger than the sum of its proper divisors (29961153).

40648815 is a wasteful number, since it uses less digits than its factorization.

40648815 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1959 (or 1956 counting only the distinct ones).

The product of its (nonzero) digits is 30720, while the sum is 36.

The square root of 40648815 is about 6375.6423205823. The cubic root of 40648815 is about 343.8343775238.

The spelling of 40648815 in words is "forty million, six hundred forty-eight thousand, eight hundred fifteen".