89173840 has 240 divisors, whose sum is σ = 274089600. Its totient is φ = 26320896.

The previous prime is 89173831. The next prime is 89173849. The reversal of 89173840 is 4837198.

It is an interprime number because it is at equal distance from previous prime (89173831) and next prime (89173849).

It is a Harshad number since it is a multiple of its sum of digits (40).

It is a zygodrome in base 4.

It is a junction number, because it is equal to n+sod(n) for n = 89173793 and 89173802.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (89173849) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 3074946 + ... + 3074974.

It is an arithmetic number, because the mean of its divisors is an integer number (1142040).

Almost surely, 2^89173840 is an apocalyptic number.

89173840 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 89173840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (137044800).

89173840 is an abundant number, since it is smaller than the sum of its proper divisors (184915760).

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

89173840 is a wasteful number, since it uses less digits than its factorization.

89173840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 102 (or 79 counting only the distinct ones).

The product of its (nonzero) digits is 48384, while the sum is 40.

The square root of 89173840 is about 9443.1901389308. The cubic root of 89173840 is about 446.7650138632.

The spelling of 89173840 in words is "eighty-nine million, one hundred seventy-three thousand, eight hundred forty".