725278740 has 96 divisors (see below), whose sum is σ = 2077125120. Its totient is φ = 189033600.

The previous prime is 725278739. The next prime is 725278747. The reversal of 725278740 is 47872527.

It is a junction number, because it is equal to n+sod(n) for n = 725278692 and 725278701.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (725278747) by changing a digit.

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 31 ways as a sum of consecutive naturals, for example, 746455 + ... + 747425.

It is an arithmetic number, because the mean of its divisors is an integer number (21636720).

Almost surely, 2^725278740 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 725278740, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1038562560).

725278740 is an abundant number, since it is smaller than the sum of its proper divisors (1351846380).

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

725278740 is a wasteful number, since it uses less digits than its factorization.

725278740 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1253 (or 1251 counting only the distinct ones).

The product of its (nonzero) digits is 219520, while the sum is 42.

The square root of 725278740 is about 26930.9996101147. Note that the first 3 decimals coincide. The cubic root of 725278740 is about 898.4660041659.

The spelling of 725278740 in words is "seven hundred twenty-five million, two hundred seventy-eight thousand, seven hundred forty".