40820520 has 128 divisors (see below), whose sum is σ = 133539840. Its totient is φ = 9922560.

The previous prime is 40820503. The next prime is 40820537. The reversal of 40820520 is 2502804.

It is an interprime number because it is at equal distance from previous prime (40820503) and next prime (40820537).

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 213625 + ... + 213815.

It is an arithmetic number, because the mean of its divisors is an integer number (1043280).

Almost surely, 2^40820520 is an apocalyptic number.

40820520 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 40820520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (66769920).

40820520 is an abundant number, since it is smaller than the sum of its proper divisors (92719320).

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

40820520 is a wasteful number, since it uses less digits than its factorization.

40820520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 355 (or 351 counting only the distinct ones).

The product of its (nonzero) digits is 640, while the sum is 21.

The square root of 40820520 is about 6389.0938324617. The cubic root of 40820520 is about 344.3178286696.

The spelling of 40820520 in words is "forty million, eight hundred twenty thousand, five hundred twenty".