89861640 has 128 divisors (see below), whose sum is σ = 309657600. Its totient is φ = 20632320.

The previous prime is 89861617. The next prime is 89861669. The reversal of 89861640 is 4616898.

It is a super-2 number, since 2×89861640² = 16150228686979200, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 89861592 and 89861601.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 23289 + ... + 26871.

It is an arithmetic number, because the mean of its divisors is an integer number (2419200).

Almost surely, 2^89861640 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 89861640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (154828800).

89861640 is an abundant number, since it is smaller than the sum of its proper divisors (219795960).

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

89861640 is a wasteful number, since it uses less digits than its factorization.

89861640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3627 (or 3623 counting only the distinct ones).

The product of its (nonzero) digits is 82944, while the sum is 42.

The square root of 89861640 is about 9479.5379634242. The cubic root of 89861640 is about 447.9107097772.

The spelling of 89861640 in words is "eighty-nine million, eight hundred sixty-one thousand, six hundred forty".