7421406740 has 72 divisors (see below), whose sum is σ = 17150896896. Its totient is φ = 2695492800.

The previous prime is 7421406731. The next prime is 7421406743. The reversal of 7421406740 is 476041247.

It is a self number, because there is not a number n which added to its sum of digits gives 7421406740.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7421406743) 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 23 ways as a sum of consecutive naturals, for example, 3210185 + ... + 3212495.

Almost surely, 2^7421406740 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 7421406740, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (8575448448).

7421406740 is an abundant number, since it is smaller than the sum of its proper divisors (9729490156).

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

7421406740 is a wasteful number, since it uses less digits than its factorization.

7421406740 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3669 (or 3656 counting only the distinct ones).

The product of its (nonzero) digits is 37632, while the sum is 35.

The square root of 7421406740 is about 86147.5869656255. The cubic root of 7421406740 is about 1950.5724149032.

Adding to 7421406740 its reverse (476041247), we get a palindrome (7897447987).

The spelling of 7421406740 in words is "seven billion, four hundred twenty-one million, four hundred six thousand, seven hundred forty".