40241220 has 48 divisors (see below), whose sum is σ = 113584128. Its totient is φ = 10644480.

The previous prime is 40241219. The next prime is 40241233. The reversal of 40241220 is 2214204.

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 40241220.

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, 4980 + ... + 10260.

It is an arithmetic number, because the mean of its divisors is an integer number (2366336).

Almost surely, 2^40241220 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 40241220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (56792064).

40241220 is an abundant number, since it is smaller than the sum of its proper divisors (73342908).

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

40241220 is a wasteful number, since it uses less digits than its factorization.

40241220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5420 (or 5418 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 15.

The square root of 40241220 is about 6343.5967715485. The cubic root of 40241220 is about 342.6812793525.

Adding to 40241220 its reverse (2214204), we get a palindrome (42455424).

The spelling of 40241220 in words is "forty million, two hundred forty-one thousand, two hundred twenty".