40515660 has 48 divisors (see below), whose sum is σ = 126050400. Its totient is φ = 10804032.

The previous prime is 40515649. The next prime is 40515661. The reversal of 40515660 is 6651504.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (40515661) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 36975 + ... + 38054.

It is an arithmetic number, because the mean of its divisors is an integer number (2626050).

Almost surely, 2^40515660 is an apocalyptic number.

It is an amenable number.

40515660 is an abundant number, since it is smaller than the sum of its proper divisors (85534740).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

40515660 is a wasteful number, since it uses less digits than its factorization.

40515660 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 75047 (or 75039 counting only the distinct ones).

The product of its (nonzero) digits is 3600, while the sum is 27.

The square root of 40515660 is about 6365.1912775658. The cubic root of 40515660 is about 343.4585293464.

The spelling of 40515660 in words is "forty million, five hundred fifteen thousand, six hundred sixty".