40481820 has 72 divisors (see below), whose sum is σ = 123439680. Its totient is φ = 10738560.

The previous prime is 40481809. The next prime is 40481849. The reversal of 40481820 is 2818404.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 42550 + ... + 43490.

It is an arithmetic number, because the mean of its divisors is an integer number (1714440).

Almost surely, 2^40481820 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 40481820, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (61719840).

40481820 is an abundant number, since it is smaller than the sum of its proper divisors (82957860).

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

40481820 is a wasteful number, since it uses less digits than its factorization.

40481820 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1195 (or 1190 counting only the distinct ones).

The product of its (nonzero) digits is 2048, while the sum is 27.

The square root of 40481820 is about 6362.5325146517. The cubic root of 40481820 is about 343.3628801249.

The spelling of 40481820 in words is "forty million, four hundred eighty-one thousand, eight hundred twenty".