40450520 has 64 divisors (see below), whose sum is σ = 100116000. Its totient is φ = 14586880.

The previous prime is 40450519. The next prime is 40450523. The reversal of 40450520 is 2505404.

It is a happy number.

40450520 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 40450492 and 40450501.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40450523) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 65252 + ... + 65868.

Almost surely, 2^40450520 is an apocalyptic number.

40450520 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 40450520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (50058000).

40450520 is an abundant number, since it is smaller than the sum of its proper divisors (59665480).

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

40450520 is a wasteful number, since it uses less digits than its factorization.

40450520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 788 (or 784 counting only the distinct ones).

The product of its (nonzero) digits is 800, while the sum is 20.

The square root of 40450520 is about 6360.0723266328. The cubic root of 40450520 is about 343.2743627838.

Adding to 40450520 its reverse (2505404), we get a palindrome (42955924).

Subtracting from 40450520 its reverse (2505404), we obtain a triangular number (37945116 = T₈₇₁₁).

The spelling of 40450520 in words is "forty million, four hundred fifty thousand, five hundred twenty".