40305520 has 20 divisors (see below), whose sum is σ = 93710520. Its totient is φ = 16122176.

The previous prime is 40305481. The next prime is 40305523. The reversal of 40305520 is 2550304.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (20).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40305523) 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 3 ways as a sum of consecutive naturals, for example, 251830 + ... + 251989.

It is an arithmetic number, because the mean of its divisors is an integer number (4685526).

Almost surely, 2^40305520 is an apocalyptic number.

40305520 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

40305520 is an abundant number, since it is smaller than the sum of its proper divisors (53405000).

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

40305520 is a wasteful number, since it uses less digits than its factorization.

40305520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 503832 (or 503826 counting only the distinct ones).

The product of its (nonzero) digits is 600, while the sum is 19.

The square root of 40305520 is about 6348.6628513412. The cubic root of 40305520 is about 342.8637015941.

Adding to 40305520 its reverse (2550304), we get a palindrome (42855824).

The spelling of 40305520 in words is "forty million, three hundred five thousand, five hundred twenty".