40240320 has 112 divisors (see below), whose sum is σ = 129040128. Its totient is φ = 10624000.

The previous prime is 40240261. The next prime is 40240339. The reversal of 40240320 is 2304204.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 40240320.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 160195 + ... + 160445.

It is an arithmetic number, because the mean of its divisors is an integer number (1152144).

Almost surely, 2^40240320 is an apocalyptic number.

40240320 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 40240320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (64520064).

40240320 is an abundant number, since it is smaller than the sum of its proper divisors (88799808).

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

40240320 is a wasteful number, since it uses less digits than its factorization.

40240320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 438 (or 428 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 15.

The square root of 40240320 is about 6343.5258334778. The cubic root of 40240320 is about 342.6787246300.

Adding to 40240320 its reverse (2304204), we get a palindrome (42544524).

The spelling of 40240320 in words is "forty million, two hundred forty thousand, three hundred twenty".