725433240 has 96 divisors (see below), whose sum is σ = 2531634480. Its totient is φ = 165811968.

The previous prime is 725433229. The next prime is 725433287. The reversal of 725433240 is 42334527.

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

It is a junction number, because it is equal to n+sod(n) for n = 725433198 and 725433207.

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 23 ways as a sum of consecutive naturals, for example, 55807 + ... + 67566.

Almost surely, 2^725433240 is an apocalyptic number.

725433240 is a gapful number since it is divisible by the number (70) formed by its first and last digit.

It is an amenable number.

725433240 is an abundant number, since it is smaller than the sum of its proper divisors (1806201240).

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

725433240 is a wasteful number, since it uses less digits than its factorization.

725433240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 123401 (or 123390 counting only the distinct ones).

The product of its (nonzero) digits is 20160, while the sum is 30.

The square root of 725433240 is about 26933.8678989855. The cubic root of 725433240 is about 898.5297971760.

Adding to 725433240 its reverse (42334527), we get a palindrome (767767767).

The spelling of 725433240 in words is "seven hundred twenty-five million, four hundred thirty-three thousand, two hundred forty".