40820720 has 40 divisors (see below), whose sum is σ = 95176944. Its totient is φ = 16282112.

The previous prime is 40820687. The next prime is 40820737. The reversal of 40820720 is 2702804.

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

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 48947 + ... + 49773.

Almost surely, 2^40820720 is an apocalyptic number.

40820720 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

40820720 is an abundant number, since it is smaller than the sum of its proper divisors (54356224).

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

40820720 is a wasteful number, since it uses less digits than its factorization.

40820720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1457 (or 1451 counting only the distinct ones).

The product of its (nonzero) digits is 896, while the sum is 23.

The square root of 40820720 is about 6389.1094841144. The cubic root of 40820720 is about 344.3183909967.

The spelling of 40820720 in words is "forty million, eight hundred twenty thousand, seven hundred twenty".