98139636 has 144 divisors (see below), whose sum is σ = 302848000. Its totient is φ = 26174016.

The previous prime is 98139599. The next prime is 98139637. The reversal of 98139636 is 63693189.

98139636 is a `hidden beast` number, since 9 + 8 + 1 + 3 + 9 + 636 = 666.

It is a hoax number, since the sum of its digits (45) coincides with the sum of the digits of its distinct prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 98139591 and 98139600.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (98139637) 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, 493065 + ... + 493263.

Almost surely, 2^98139636 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 98139636, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (151424000).

98139636 is an abundant number, since it is smaller than the sum of its proper divisors (204708364).

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

98139636 is a wasteful number, since it uses less digits than its factorization.

98139636 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 338 (or 333 counting only the distinct ones).

The product of its digits is 209952, while the sum is 45.

The square root of 98139636 is about 9906.5451091690. The cubic root of 98139636 is about 461.2624990554.

The spelling of 98139636 in words is "ninety-eight million, one hundred thirty-nine thousand, six hundred thirty-six".