40221740 has 24 divisors (see below), whose sum is σ = 90963600. Its totient is φ = 14851008.

The previous prime is 40221737. The next prime is 40221743. The reversal of 40221740 is 4712204.

40221740 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (40221737) and next prime (40221743).

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 (40221743) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 77090 + ... + 77609.

It is an arithmetic number, because the mean of its divisors is an integer number (3790150).

Almost surely, 2^40221740 is an apocalyptic number.

It is an amenable number.

40221740 is an abundant number, since it is smaller than the sum of its proper divisors (50741860).

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

40221740 is a wasteful number, since it uses less digits than its factorization.

40221740 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 154721 (or 154719 counting only the distinct ones).

The product of its (nonzero) digits is 448, while the sum is 20.

The square root of 40221740 is about 6342.0611791436. The cubic root of 40221740 is about 342.6259752906.

Adding to 40221740 its reverse (4712204), we get a palindrome (44933944).

The spelling of 40221740 in words is "forty million, two hundred twenty-one thousand, seven hundred forty".