89853729840 has 480 divisors, whose sum is σ = 375758568960. Its totient is φ = 19328937984.

The previous prime is 89853729809. The next prime is 89853729851. The reversal of 89853729840 is 4892735898.

89853729840 is a `hidden beast` number, since 8 + 9 + 8 + 537 + 2 + 98 + 4 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 4359399 + ... + 4379961.

It is an arithmetic number, because the mean of its divisors is an integer number (782830352).

Almost surely, 2^89853729840 is an apocalyptic number.

89853729840 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 89853729840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (187879284480).

89853729840 is an abundant number, since it is smaller than the sum of its proper divisors (285904839120).

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

89853729840 is a wasteful number, since it uses less digits than its factorization.

89853729840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20626 (or 20597 counting only the distinct ones).

The product of its (nonzero) digits is 34836480, while the sum is 63.

The spelling of 89853729840 in words is "eighty-nine billion, eight hundred fifty-three million, seven hundred twenty-nine thousand, eight hundred forty".