40244540 has 48 divisors (see below), whose sum is σ = 96987072. Its totient is φ = 13741056.

The previous prime is 40244521. The next prime is 40244551. The reversal of 40244540 is 4544204.

It is a congruent number.

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, 46754 + ... + 47606.

It is an arithmetic number, because the mean of its divisors is an integer number (2020564).

Almost surely, 2^40244540 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 40244540, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (48493536).

40244540 is an abundant number, since it is smaller than the sum of its proper divisors (56742532).

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

40244540 is a wasteful number, since it uses less digits than its factorization.

With its predecessor (40244539) it forms an eRAP, since the sums of their prime factors are consecutive (1205 and 1206).

40244540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1206 (or 1204 counting only the distinct ones).

The product of its (nonzero) digits is 2560, while the sum is 23.

The square root of 40244540 is about 6343.8584473489. The cubic root of 40244540 is about 342.6907031105.

Adding to 40244540 its reverse (4544204), we get a palindrome (44788744).

The spelling of 40244540 in words is "forty million, two hundred forty-four thousand, five hundred forty".