89123840 has 132 divisors (see below), whose sum is σ = 233751024. Its totient is φ = 32587776.

The previous prime is 89123833. The next prime is 89123849. The reversal of 89123840 is 4832198.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 89123840.

It is not an unprimeable number, because it can be changed into a prime (89123849) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 865229 + ... + 865331.

Almost surely, 2^89123840 is an apocalyptic number.

89123840 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 89123840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (116875512).

89123840 is an abundant number, since it is smaller than the sum of its proper divisors (144627184).

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

89123840 is a wasteful number, since it uses less digits than its factorization.

89123840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 154 (or 123 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 35.

The square root of 89123840 is about 9440.5423573013. The cubic root of 89123840 is about 446.6814974903.

The spelling of 89123840 in words is "eighty-nine million, one hundred twenty-three thousand, eight hundred forty".