725235420 has 192 divisors, whose sum is σ = 2558223360. Its totient is φ = 149409792.

The previous prime is 725235373. The next prime is 725235461. The reversal of 725235420 is 24532527.

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

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 233236 + ... + 236324.

It is an arithmetic number, because the mean of its divisors is an integer number (13324080).

Almost surely, 2^725235420 is an apocalyptic number.

725235420 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 725235420, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1279111680).

725235420 is an abundant number, since it is smaller than the sum of its proper divisors (1832987940).

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

725235420 is a wasteful number, since it uses less digits than its factorization.

725235420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3164 (or 3162 counting only the distinct ones).

The product of its (nonzero) digits is 16800, while the sum is 30.

The square root of 725235420 is about 26930.1953204948. The cubic root of 725235420 is about 898.4481157228.

Adding to 725235420 its reverse (24532527), we get a palindrome (749767947).

The spelling of 725235420 in words is "seven hundred twenty-five million, two hundred thirty-five thousand, four hundred twenty".