40831560 has 256 divisors, whose sum is σ = 170035200. Its totient is φ = 8467200.

The previous prime is 40831559. The next prime is 40831561. The reversal of 40831560 is 6513804.

It is an interprime number because it is at equal distance from previous prime (40831559) and next prime (40831561).

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40831561) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 82915 + ... + 83405.

It is an arithmetic number, because the mean of its divisors is an integer number (664200).

Almost surely, 2^40831560 is an apocalyptic number.

40831560 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 40831560, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (85017600).

40831560 is an abundant number, since it is smaller than the sum of its proper divisors (129203640).

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

40831560 is a wasteful number, since it uses less digits than its factorization.

40831560 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 529 (or 519 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 27.

The square root of 40831560 is about 6389.9577463392. The cubic root of 40831560 is about 344.3488663781.

The spelling of 40831560 in words is "forty million, eight hundred thirty-one thousand, five hundred sixty".