89449920 has 560 divisors, whose sum is σ = 398312640. Its totient is φ = 18579456.

The previous prime is 89449909. The next prime is 89449939. The reversal of 89449920 is 2994498.

It is a tau number, because it is divible by the number of its divisors (560).

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 3084466 + ... + 3084494.

Almost surely, 2^89449920 is an apocalyptic number.

89449920 is a gapful number since it is divisible by the number (80) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 89449920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (199156320).

89449920 is an abundant number, since it is smaller than the sum of its proper divisors (308862720).

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

89449920 is a wasteful number, since it uses less digits than its factorization.

89449920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 82 (or 63 counting only the distinct ones).

The product of its (nonzero) digits is 186624, while the sum is 45.

The square root of 89449920 is about 9457.7967836066. The cubic root of 89449920 is about 447.2255966779.

The spelling of 89449920 in words is "eighty-nine million, four hundred forty-nine thousand, nine hundred twenty".