89661940 has 12 divisors (see below), whose sum is σ = 188290116. Its totient is φ = 35864768.

The previous prime is 89661917. The next prime is 89661941. The reversal of 89661940 is 4916698.

It can be written as a sum of positive squares in 2 ways, for example, as 29008996 + 60652944 = 5386^2 + 7788^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (89661941) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2241529 + ... + 2241568.

It is an arithmetic number, because the mean of its divisors is an integer number (15690843).

Almost surely, 2^89661940 is an apocalyptic number.

It is an amenable number.

89661940 is an abundant number, since it is smaller than the sum of its proper divisors (98628176).

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

89661940 is a wasteful number, since it uses less digits than its factorization.

89661940 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4483106 (or 4483104 counting only the distinct ones).

The product of its (nonzero) digits is 93312, while the sum is 43.

The square root of 89661940 is about 9468.9988911183. The cubic root of 89661940 is about 447.5786655710.

It can be divided in two parts, 89661 and 940, that added together give a square (90601 = 301²).

The spelling of 89661940 in words is "eighty-nine million, six hundred sixty-one thousand, nine hundred forty".