725287408 has 40 divisors (see below), whose sum is σ = 1459636736. Its totient is φ = 348753600.

The previous prime is 725287397. The next prime is 725287411. The reversal of 725287408 is 804782527.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 76363 + ... + 85333.

Almost surely, 2^725287408 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 725287408, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (729818368).

725287408 is an abundant number, since it is smaller than the sum of its proper divisors (734349328).

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

725287408 is a wasteful number, since it uses less digits than its factorization.

725287408 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9173 (or 9167 counting only the distinct ones).

The product of its (nonzero) digits is 250880, while the sum is 43.

The square root of 725287408 is about 26931.1605394198. The cubic root of 725287408 is about 898.4695834207.

The spelling of 725287408 in words is "seven hundred twenty-five million, two hundred eighty-seven thousand, four hundred eight".