7123305240 has 160 divisors (see below), whose sum is σ = 24714898560. Its totient is φ = 1838246400.

The previous prime is 7123305239. The next prime is 7123305283. The reversal of 7123305240 is 425033217.

It is a super-2 number, since 2×7123305240² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 64980 + ... + 135900.

It is an arithmetic number, because the mean of its divisors is an integer number (154468116).

Almost surely, 2^7123305240 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 7123305240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (12357449280).

7123305240 is an abundant number, since it is smaller than the sum of its proper divisors (17591593320).

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

7123305240 is a wasteful number, since it uses less digits than its factorization.

7123305240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 70975 (or 70962 counting only the distinct ones).

The product of its (nonzero) digits is 5040, while the sum is 27.

The square root of 7123305240 is about 84399.6755917936. The cubic root of 7123305240 is about 1924.0979854518.

Adding to 7123305240 its reverse (425033217), we get a palindrome (7548338457).

The spelling of 7123305240 in words is "seven billion, one hundred twenty-three million, three hundred five thousand, two hundred forty".