7523740 has 48 divisors (see below), whose sum is σ = 18373824. Its totient is φ = 2534400.

The previous prime is 7523729. The next prime is 7523767. The reversal of 7523740 is 473257.

It is a Harshad number since it is a multiple of its sum of digits (28).

It is a junction number, because it is equal to n+sod(n) for n = 7523699 and 7523708.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8100 + ... + 8980.

It is an arithmetic number, because the mean of its divisors is an integer number (382788).

Almost surely, 2^7523740 is an apocalyptic number.

7523740 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 7523740, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (9186912).

7523740 is an abundant number, since it is smaller than the sum of its proper divisors (10850084).

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

7523740 is a wasteful number, since it uses less digits than its factorization.

7523740 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 958 (or 956 counting only the distinct ones).

The product of its (nonzero) digits is 5880, while the sum is 28.

The square root of 7523740 is about 2742.9436742303. The cubic root of 7523740 is about 195.9496955450.

Adding to 7523740 its reverse (473257), we get a palindrome (7996997).

The spelling of 7523740 in words is "seven million, five hundred twenty-three thousand, seven hundred forty".