7257998844 has 144 divisors (see below), whose sum is σ = 19324032000. Its totient is φ = 2381835456.

The previous prime is 7257998833. The next prime is 7257998851. The reversal of 7257998844 is 4488997527.

It is a congruent number.

It is an unprimeable number.

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 47 ways as a sum of consecutive naturals, for example, 30368077 + ... + 30368315.

Almost surely, 2^7257998844 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 7257998844, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (9662016000).

7257998844 is an abundant number, since it is smaller than the sum of its proper divisors (12066033156).

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

7257998844 is a wasteful number, since it uses less digits than its factorization.

7257998844 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 614 (or 600 counting only the distinct ones).

The product of its digits is 40642560, while the sum is 63.

The square root of 7257998844 is about 85193.8897104716. The cubic root of 7257998844 is about 1936.1498411988.

The spelling of 7257998844 in words is "seven billion, two hundred fifty-seven million, nine hundred ninety-eight thousand, eight hundred forty-four".