40509660 has 24 divisors (see below), whose sum is σ = 113427216. Its totient is φ = 10802560.

The previous prime is 40509659. The next prime is 40509661. The reversal of 40509660 is 6690504.

It is an interprime number because it is at equal distance from previous prime (40509659) and next prime (40509661).

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40509661) 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 7 ways as a sum of consecutive naturals, for example, 337521 + ... + 337640.

It is an arithmetic number, because the mean of its divisors is an integer number (4726134).

Almost surely, 2^40509660 is an apocalyptic number.

It is an amenable number.

40509660 is an abundant number, since it is smaller than the sum of its proper divisors (72917556).

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

40509660 is a wasteful number, since it uses less digits than its factorization.

40509660 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 675173 (or 675171 counting only the distinct ones).

The product of its (nonzero) digits is 6480, while the sum is 30.

The square root of 40509660 is about 6364.7199467062. The cubic root of 40509660 is about 343.4415741500.

The spelling of 40509660 in words is "forty million, five hundred nine thousand, six hundred sixty".