98709840 has 100 divisors (see below), whose sum is σ = 342856404. Its totient is φ = 26320896.

The previous prime is 98709833. The next prime is 98709841. The reversal of 98709840 is 4890789.

It can be written as a sum of positive squares in 2 ways, for example, as 24681024 + 74028816 = 4968^2 + 8604^2 .

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (98709841) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 1137 + ... + 14096.

Almost surely, 2^98709840 is an apocalyptic number.

98709840 is a gapful number since it is divisible by the number (90) 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 98709840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (171428202).

98709840 is an abundant number, since it is smaller than the sum of its proper divisors (244146564).

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

98709840 is a wasteful number, since it uses less digits than its factorization.

98709840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15258 (or 15243 counting only the distinct ones).

The product of its (nonzero) digits is 145152, while the sum is 45.

The square root of 98709840 is about 9935.2825827955. The cubic root of 98709840 is about 462.1541061210.

The spelling of 98709840 in words is "ninety-eight million, seven hundred nine thousand, eight hundred forty".