89311640 has 32 divisors (see below), whose sum is σ = 219220560. Its totient is φ = 32476800.

The previous prime is 89311639. The next prime is 89311667. The reversal of 89311640 is 4611398.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 89311597 and 89311606.

It is a congruent number.

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, 101051 + ... + 101930.

Almost surely, 2^89311640 is an apocalyptic number.

It is an amenable number.

89311640 is an abundant number, since it is smaller than the sum of its proper divisors (129908920).

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

89311640 is a wasteful number, since it uses less digits than its factorization.

89311640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 203003 (or 202999 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 32.

The square root of 89311640 is about 9450.4835855103. The cubic root of 89311640 is about 446.9950235254.

It can be divided in two parts, 893 and 11640, that multiplied together give a triangular number (10394520 = T₄₅₅₉).

The spelling of 89311640 in words is "eighty-nine million, three hundred eleven thousand, six hundred forty".