41981540 has 24 divisors (see below), whose sum is σ = 90313272. Its totient is φ = 16382720.

The previous prime is 41981539. The next prime is 41981549. The reversal of 41981540 is 4518914.

It can be written as a sum of positive squares in 4 ways, for example, as 5885476 + 36096064 = 2426^2 + 6008^2 .

It is a junction number, because it is equal to n+sod(n) for n = 41981497 and 41981506.

It is not an unprimeable number, because it can be changed into a prime (41981549) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 24779 + ... + 26418.

It is an arithmetic number, because the mean of its divisors is an integer number (3763053).

Almost surely, 2^41981540 is an apocalyptic number.

It is an amenable number.

41981540 is an abundant number, since it is smaller than the sum of its proper divisors (48331732).

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

41981540 is a wasteful number, since it uses less digits than its factorization.

41981540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51247 (or 51245 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 32.

The square root of 41981540 is about 6479.3163219587. The cubic root of 41981540 is about 347.5517304766.

The spelling of 41981540 in words is "forty-one million, nine hundred eighty-one thousand, five hundred forty".