7255936240 has 80 divisors (see below), whose sum is σ = 19395758592. Its totient is φ = 2472820992.

The previous prime is 7255936231. The next prime is 7255936241. The reversal of 7255936240 is 426395527.

It is a tau number, because it is divible by the number of its divisors (80).

It is a super-2 number, since 2×7255936240² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7255936241) 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 15 ways as a sum of consecutive naturals, for example, 54727 + ... + 132313.

Almost surely, 2^7255936240 is an apocalyptic number.

7255936240 is a gapful number since it is divisible by the number (70) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 7255936240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (9697879296).

7255936240 is an abundant number, since it is smaller than the sum of its proper divisors (12139822352).

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

7255936240 is a wasteful number, since it uses less digits than its factorization.

7255936240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 77774 (or 77768 counting only the distinct ones).

The product of its (nonzero) digits is 453600, while the sum is 43.

The square root of 7255936240 is about 85181.7834985861. The cubic root of 7255936240 is about 1935.9664164996.

The spelling of 7255936240 in words is "seven billion, two hundred fifty-five million, nine hundred thirty-six thousand, two hundred forty".