40243500 has 192 divisors, whose sum is σ = 142571520. Its totient is φ = 9720000.

The previous prime is 40243499. The next prime is 40243507. The reversal of 40243500 is 534204.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is not an unprimeable number, because it can be changed into a prime (40243507) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 148365 + ... + 148635.

It is an arithmetic number, because the mean of its divisors is an integer number (742560).

Almost surely, 2^40243500 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 40243500, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (71285760).

40243500 is an abundant number, since it is smaller than the sum of its proper divisors (102328020).

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

40243500 is a wasteful number, since it uses less digits than its factorization.

40243500 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 310 (or 292 counting only the distinct ones).

The product of its (nonzero) digits is 480, while the sum is 18.

The square root of 40243500 is about 6343.7764777773. The cubic root of 40243500 is about 342.6877511457.

Adding to 40243500 its reverse (534204), we get a palindrome (40777704).

The spelling of 40243500 in words is "forty million, two hundred forty-three thousand, five hundred".