89782640 has 20 divisors (see below), whose sum is σ = 208744824. Its totient is φ = 35913024.

The previous prime is 89782633. The next prime is 89782673. The reversal of 89782640 is 4628798.

It is a tau number, because it is divible by the number of its divisors (20).

It is a junction number, because it is equal to n+sod(n) for n = 89782591 and 89782600.

It is a congruent number.

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, 561062 + ... + 561221.

Almost surely, 2^89782640 is an apocalyptic number.

89782640 is a gapful number since it is divisible by the number (80) formed by its first and last digit.

It is an amenable number.

89782640 is an abundant number, since it is smaller than the sum of its proper divisors (118962184).

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

89782640 is a wasteful number, since it uses less digits than its factorization.

89782640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1122296 (or 1122290 counting only the distinct ones).

The product of its (nonzero) digits is 193536, while the sum is 44.

The square root of 89782640 is about 9475.3701774654. The cubic root of 89782640 is about 447.7794141526.

The spelling of 89782640 in words is "eighty-nine million, seven hundred eighty-two thousand, six hundred forty".