89723540 has 12 divisors (see below), whose sum is σ = 188419476. Its totient is φ = 35889408.

The previous prime is 89723533. The next prime is 89723549. The reversal of 89723540 is 4532798.

It can be written as a sum of positive squares in 2 ways, for example, as 54700816 + 35022724 = 7396^2 + 5918^2 .

It is a junction number, because it is equal to n+sod(n) for n = 89723494 and 89723503.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (89723549) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2243069 + ... + 2243108.

It is an arithmetic number, because the mean of its divisors is an integer number (15701623).

Almost surely, 2^89723540 is an apocalyptic number.

It is an amenable number.

89723540 is an abundant number, since it is smaller than the sum of its proper divisors (98695936).

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

89723540 is a wasteful number, since it uses less digits than its factorization.

89723540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4486186 (or 4486184 counting only the distinct ones).

The product of its (nonzero) digits is 60480, while the sum is 38.

The square root of 89723540 is about 9472.2510524162. The cubic root of 89723540 is about 447.6811413604.

The spelling of 89723540 in words is "eighty-nine million, seven hundred twenty-three thousand, five hundred forty".