725784870 has 64 divisors (see below), whose sum is σ = 1811206656. Its totient is φ = 185982720.

The previous prime is 725784797. The next prime is 725784877. The reversal of 725784870 is 78487527.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (725784877) 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, 78007 + ... + 86813.

It is an arithmetic number, because the mean of its divisors is an integer number (28300104).

Almost surely, 2^725784870 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 725784870, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (905603328).

725784870 is an abundant number, since it is smaller than the sum of its proper divisors (1085421786).

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

725784870 is a wasteful number, since it uses less digits than its factorization.

725784870 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8925.

The product of its (nonzero) digits is 878080, while the sum is 48.

The square root of 725784870 is about 26940.3947632547. The cubic root of 725784870 is about 898.6749513543.

The spelling of 725784870 in words is "seven hundred twenty-five million, seven hundred eighty-four thousand, eight hundred seventy".