40370240 has 112 divisors (see below), whose sum is σ = 104845104. Its totient is φ = 14745600.

The previous prime is 40370203. The next prime is 40370243. The reversal of 40370240 is 4207304.

It is a happy number.

It can be written as a sum of positive squares in 8 ways, for example, as 10863616 + 29506624 = 3296^2 + 5432^2 .

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

It is not an unprimeable number, because it can be changed into a prime (40370243) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (5) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 222950 + ... + 223130.

It is an arithmetic number, because the mean of its divisors is an integer number (936117).

Almost surely, 2^40370240 is an apocalyptic number.

40370240 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 40370240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (52422552).

40370240 is an abundant number, since it is smaller than the sum of its proper divisors (64474864).

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

40370240 is a wasteful number, since it uses less digits than its factorization.

40370240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 256 (or 246 counting only the distinct ones).

The product of its (nonzero) digits is 672, while the sum is 20.

The square root of 40370240 is about 6353.7579431388. The cubic root of 40370240 is about 343.0471195824.

Adding to 40370240 its reverse (4207304), we get a palindrome (44577544).

The spelling of 40370240 in words is "forty million, three hundred seventy thousand, two hundred forty".