40681520 has 40 divisors (see below), whose sum is σ = 103185360. Its totient is φ = 14792960.

The previous prime is 40681499. The next prime is 40681559. The reversal of 40681520 is 2518604.

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

It is a zygodrome in base 3.

It is a self number, because there is not a number n which added to its sum of digits gives 40681520.

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, 22235 + ... + 23994.

It is an arithmetic number, because the mean of its divisors is an integer number (2579634).

Almost surely, 2^40681520 is an apocalyptic number.

40681520 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

40681520 is an abundant number, since it is smaller than the sum of its proper divisors (62503840).

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

40681520 is a wasteful number, since it uses less digits than its factorization.

40681520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46253 (or 46247 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 26.

The square root of 40681520 is about 6378.2066445044. The cubic root of 40681520 is about 343.9265662614.

The spelling of 40681520 in words is "forty million, six hundred eighty-one thousand, five hundred twenty".