40243284 has 96 divisors (see below), whose sum is σ = 115395840. Its totient is φ = 12063744.

The previous prime is 40243283. The next prime is 40243303. The reversal of 40243284 is 48234204.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40243283) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 41752 + ... + 42704.

It is an arithmetic number, because the mean of its divisors is an integer number (1202040).

Almost surely, 2^40243284 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 40243284, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (57697920).

40243284 is an abundant number, since it is smaller than the sum of its proper divisors (75152556).

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

40243284 is a wasteful number, since it uses less digits than its factorization.

40243284 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1006 (or 998 counting only the distinct ones).

The product of its (nonzero) digits is 6144, while the sum is 27.

The square root of 40243284 is about 6343.7594531949. The cubic root of 40243284 is about 342.6871380389.

Adding to 40243284 its reverse (48234204), we get a palindrome (88477488).

The spelling of 40243284 in words is "forty million, two hundred forty-three thousand, two hundred eighty-four".