740244421 has 8 divisors (see below), whose sum is σ = 863259200. Its totient is φ = 634494924.

The previous prime is 740244419. The next prime is 740244433. The reversal of 740244421 is 124442047.

It is not a de Polignac number, because 740244421 - 2¹ = 740244419 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 740244421.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (740244221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1078731 + ... + 1079416.

It is an arithmetic number, because the mean of its divisors is an integer number (107907400).

Almost surely, 2^740244421 is an apocalyptic number.

It is an amenable number.

740244421 is a deficient number, since it is larger than the sum of its proper divisors (123014779).

740244421 is an equidigital number, since it uses as much as digits as its factorization.

740244421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2158168 (or 2158154 counting only the distinct ones).

The product of its (nonzero) digits is 7168, while the sum is 28.

The square root of 740244421 is about 27207.4331938902. The cubic root of 740244421 is about 904.6037441904.

Adding to 740244421 its reverse (124442047), we get a palindrome (864686468).

The spelling of 740244421 in words is "seven hundred forty million, two hundred forty-four thousand, four hundred twenty-one".