7452721400 has 24 divisors (see below), whose sum is σ = 17327577720. Its totient is φ = 2981088480.

The previous prime is 7452721399. The next prime is 7452721403. The reversal of 7452721400 is 41272547.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7452721403) 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 5 ways as a sum of consecutive naturals, for example, 18631604 + ... + 18632003.

It is an arithmetic number, because the mean of its divisors is an integer number (721982405).

Almost surely, 2^7452721400 is an apocalyptic number.

It is an amenable number.

7452721400 is an abundant number, since it is smaller than the sum of its proper divisors (9874856320).

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

7452721400 is a wasteful number, since it uses less digits than its factorization.

7452721400 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37263623 (or 37263614 counting only the distinct ones).

The product of its (nonzero) digits is 15680, while the sum is 32.

The square root of 7452721400 is about 86329.1457156852. The cubic root of 7452721400 is about 1953.3120483132.

Adding to 7452721400 its reverse (41272547), we get a palindrome (7493993947).

The spelling of 7452721400 in words is "seven billion, four hundred fifty-two million, seven hundred twenty-one thousand, four hundred".