7123342440 has 256 divisors, whose sum is σ = 23482368000. Its totient is φ = 1721917440.

The previous prime is 7123342439. The next prime is 7123342441. The reversal of 7123342440 is 442433217.

It is an interprime number because it is at equal distance from previous prime (7123342439) and next prime (7123342441).

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a junction number, because it is equal to n+sod(n) for n = 7123342398 and 7123342407.

It is not an unprimeable number, because it can be changed into a prime (7123342441) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 6855441 + ... + 6856479.

It is an arithmetic number, because the mean of its divisors is an integer number (91728000).

Almost surely, 2^7123342440 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 7123342440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (11741184000).

7123342440 is an abundant number, since it is smaller than the sum of its proper divisors (16359025560).

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

7123342440 is a wasteful number, since it uses less digits than its factorization.

7123342440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1200 (or 1196 counting only the distinct ones).

The product of its (nonzero) digits is 16128, while the sum is 30.

The square root of 7123342440 is about 84399.8959714999. The cubic root of 7123342440 is about 1924.1013348483.

Adding to 7123342440 its reverse (442433217), we get a palindrome (7565775657).

The spelling of 7123342440 in words is "seven billion, one hundred twenty-three million, three hundred forty-two thousand, four hundred forty".