40353540 has 48 divisors (see below), whose sum is σ = 114125760. Its totient is φ = 10652800.

The previous prime is 40353527. The next prime is 40353541. The reversal of 40353540 is 4535304.

It is a happy number.

It is a nialpdrome in base 7.

It is a self number, because there is not a number n which added to its sum of digits gives 40353540.

It is not an unprimeable number, because it can be changed into a prime (40353541) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2731 + ... + 9389.

It is an arithmetic number, because the mean of its divisors is an integer number (2377620).

Almost surely, 2^40353540 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 40353540, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (57062880).

40353540 is an abundant number, since it is smaller than the sum of its proper divisors (73772220).

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

40353540 is a wasteful number, since it uses less digits than its factorization.

40353540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6772 (or 6770 counting only the distinct ones).

The product of its (nonzero) digits is 3600, while the sum is 24.

The square root of 40353540 is about 6352.4436243071. The cubic root of 40353540 is about 342.9998101697. Note that the first 3 decimals are identical.

Adding to 40353540 its reverse (4535304), we get a palindrome (44888844).

The spelling of 40353540 in words is "forty million, three hundred fifty-three thousand, five hundred forty".