40252520 has 96 divisors (see below), whose sum is σ = 114994080. Its totient is φ = 12539520.

The previous prime is 40252519. The next prime is 40252547. The reversal of 40252520 is 2525204.

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 = 40252492 and 40252501.

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 23 ways as a sum of consecutive naturals, for example, 20627 + ... + 22493.

It is an arithmetic number, because the mean of its divisors is an integer number (1197855).

Almost surely, 2^40252520 is an apocalyptic number.

40252520 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 40252520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (57497040).

40252520 is an abundant number, since it is smaller than the sum of its proper divisors (74741560).

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

40252520 is a wasteful number, since it uses less digits than its factorization.

40252520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1903 (or 1892 counting only the distinct ones).

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

The square root of 40252520 is about 6344.4873709386. The cubic root of 40252520 is about 342.7133520718.

Adding to 40252520 its reverse (2525204), we get a palindrome (42777724).

The spelling of 40252520 in words is "forty million, two hundred fifty-two thousand, five hundred twenty".