725461990 has 48 divisors (see below), whose sum is σ = 1503547920. Its totient is φ = 249906240.

The previous prime is 725461963. The next prime is 725461993. The reversal of 725461990 is 99164527.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (725461993) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 30576 + ... + 48844.

It is an arithmetic number, because the mean of its divisors is an integer number (31323915).

Almost surely, 2^725461990 is an apocalyptic number.

725461990 is an abundant number, since it is smaller than the sum of its proper divisors (778085930).

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

725461990 is a wasteful number, since it uses less digits than its factorization.

725461990 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18325 (or 18306 counting only the distinct ones).

The product of its (nonzero) digits is 136080, while the sum is 43.

The square root of 725461990 is about 26934.4016083521. The cubic root of 725461990 is about 898.5416670440.

The spelling of 725461990 in words is "seven hundred twenty-five million, four hundred sixty-one thousand, nine hundred ninety".