40003520 has 56 divisors (see below), whose sum is σ = 96012000. Its totient is φ = 15875072.

The previous prime is 40003519. The next prime is 40003541. The reversal of 40003520 is 2530004.

It is a super-2 number, since 2×40003520² = 3200563224780800, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 40003495 and 40003504.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 47261 + ... + 48099.

It is an arithmetic number, because the mean of its divisors is an integer number (1714500).

Almost surely, 2^40003520 is an apocalyptic number.

40003520 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 40003520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (48006000).

40003520 is an abundant number, since it is smaller than the sum of its proper divisors (56008480).

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

40003520 is a wasteful number, since it uses less digits than its factorization.

40003520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1005 (or 995 counting only the distinct ones).

The product of its (nonzero) digits is 120, while the sum is 14.

The square root of 40003520 is about 6324.8335946490. The cubic root of 40003520 is about 342.0052209000.

Adding to 40003520 its reverse (2530004), we get a palindrome (42533524).

The spelling of 40003520 in words is "forty million, three thousand, five hundred twenty".