40447720 has 32 divisors (see below), whose sum is σ = 91852200. Its totient is φ = 16028928.

The previous prime is 40447711. The next prime is 40447787. The reversal of 40447720 is 2774404.

40447720 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 39012516 + 1435204 = 6246^2 + 1198^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 279 + ... + 8998.

Almost surely, 2^40447720 is an apocalyptic number.

40447720 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

40447720 is an abundant number, since it is smaller than the sum of its proper divisors (51404480).

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

40447720 is a wasteful number, since it uses less digits than its factorization.

40447720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9397 (or 9393 counting only the distinct ones).

The product of its (nonzero) digits is 6272, while the sum is 28.

The square root of 40447720 is about 6359.8521995405. The cubic root of 40447720 is about 343.2664420747.

The spelling of 40447720 in words is "forty million, four hundred forty-seven thousand, seven hundred twenty".