89749640 has 16 divisors (see below), whose sum is σ = 201936780. Its totient is φ = 35899840.

The previous prime is 89749637. The next prime is 89749661. The reversal of 89749640 is 4694798.

It can be written as a sum of positive squares in 2 ways, for example, as 78039556 + 11710084 = 8834^2 + 3422^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1121831 + ... + 1121910.

Almost surely, 2^89749640 is an apocalyptic number.

It is an amenable number.

89749640 is an abundant number, since it is smaller than the sum of its proper divisors (112187140).

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

89749640 is a wasteful number, since it uses less digits than its factorization.

89749640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2243752 (or 2243748 counting only the distinct ones).

The product of its (nonzero) digits is 435456, while the sum is 47.

The square root of 89749640 is about 9473.6286606559. The cubic root of 89749640 is about 447.7245463390.

The spelling of 89749640 in words is "eighty-nine million, seven hundred forty-nine thousand, six hundred forty".