40512720 has 40 divisors (see below), whose sum is σ = 125590176. Its totient is φ = 10803328.

The previous prime is 40512679. The next prime is 40512727. The reversal of 40512720 is 2721504.

It is a tau number, because it is divible by the number of its divisors (40).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40512727) 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, 84162 + ... + 84641.

Almost surely, 2^40512720 is an apocalyptic number.

40512720 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

40512720 is an abundant number, since it is smaller than the sum of its proper divisors (85077456).

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

40512720 is a wasteful number, since it uses less digits than its factorization.

40512720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 168819 (or 168813 counting only the distinct ones).

The product of its (nonzero) digits is 560, while the sum is 21.

The square root of 40512720 is about 6364.9603298057. The cubic root of 40512720 is about 343.4502215093.

The spelling of 40512720 in words is "forty million, five hundred twelve thousand, seven hundred twenty".