89728440 has 32 divisors (see below), whose sum is σ = 269185680. Its totient is φ = 23927552.

The previous prime is 89728433. The next prime is 89728453. The reversal of 89728440 is 4482798.

It is a junction number, because it is equal to n+sod(n) for n = 89728392 and 89728401.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 373749 + ... + 373988.

Almost surely, 2^89728440 is an apocalyptic number.

It is an amenable number.

89728440 is an abundant number, since it is smaller than the sum of its proper divisors (179457240).

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

89728440 is a wasteful number, since it uses less digits than its factorization.

89728440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 747751 (or 747747 counting only the distinct ones).

The product of its (nonzero) digits is 129024, while the sum is 42.

The square root of 89728440 is about 9472.5096991241. The cubic root of 89728440 is about 447.6892908296.

The spelling of 89728440 in words is "eighty-nine million, seven hundred twenty-eight thousand, four hundred forty".