89019840 has 224 divisors, whose sum is σ = 348203520. Its totient is φ = 18763776.

The previous prime is 89019839. The next prime is 89019863. The reversal of 89019840 is 4891098.

It is a tau number, because it is divible by the number of its divisors (224).

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 86851 + ... + 87869.

It is an arithmetic number, because the mean of its divisors is an integer number (1554480).

Almost surely, 2^89019840 is an apocalyptic number.

89019840 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 89019840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (174101760).

89019840 is an abundant number, since it is smaller than the sum of its proper divisors (259183680).

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

89019840 is a wasteful number, since it uses less digits than its factorization.

89019840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1059 (or 1049 counting only the distinct ones).

The product of its (nonzero) digits is 20736, while the sum is 39.

The square root of 89019840 is about 9435.0325913587. The cubic root of 89019840 is about 446.5076833267.

The spelling of 89019840 in words is "eighty-nine million, nineteen thousand, eight hundred forty".