89086640 has 40 divisors (see below), whose sum is σ = 211044528. Its totient is φ = 34960640.

The previous prime is 89086633. The next prime is 89086661. The reversal of 89086640 is 4668098.

It is a tau number, because it is divible by the number of its divisors (40).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6266 + ... + 14745.

Almost surely, 2^89086640 is an apocalyptic number.

89086640 is a gapful number since it is divisible by the number (80) formed by its first and last digit.

It is an amenable number.

89086640 is an abundant number, since it is smaller than the sum of its proper divisors (121957888).

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

89086640 is a wasteful number, since it uses less digits than its factorization.

89086640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21077 (or 21071 counting only the distinct ones).

The product of its (nonzero) digits is 82944, while the sum is 41.

The square root of 89086640 is about 9438.5719258795. The cubic root of 89086640 is about 446.6193410417.

The spelling of 89086640 in words is "eighty-nine million, eighty-six thousand, six hundred forty".