40681540 has 24 divisors (see below), whose sum is σ = 85962240. Its totient is φ = 16171488.

The previous prime is 40681499. The next prime is 40681559. The reversal of 40681540 is 4518604.

It is a junction number, because it is equal to n+sod(n) for n = 40681499 and 40681508.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2980 + ... + 9499.

It is an arithmetic number, because the mean of its divisors is an integer number (3581760).

Almost surely, 2^40681540 is an apocalyptic number.

It is an amenable number.

40681540 is an abundant number, since it is smaller than the sum of its proper divisors (45280700).

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

40681540 is a wasteful number, since it uses less digits than its factorization.

40681540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12651 (or 12649 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 28.

The square root of 40681540 is about 6378.2082123430. The cubic root of 40681540 is about 343.9266226222.

The spelling of 40681540 in words is "forty million, six hundred eighty-one thousand, five hundred forty".