98987638 has 4 divisors (see below), whose sum is σ = 148481460. Its totient is φ = 49493818.

The previous prime is 98987579. The next prime is 98987639. The reversal of 98987638 is 83678989.

It is a semiprime because it is the product of two primes.

It is an alternating number because its digits alternate between odd and even.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (98987639) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 24746908 + ... + 24746911.

It is an arithmetic number, because the mean of its divisors is an integer number (37120365).

Almost surely, 2^98987638 is an apocalyptic number.

98987638 is a deficient number, since it is larger than the sum of its proper divisors (49493822).

98987638 is a wasteful number, since it uses less digits than its factorization.

98987638 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49493821.

The product of its digits is 5225472, while the sum is 58.

The square root of 98987638 is about 9949.2531377988. The cubic root of 98987638 is about 462.5872450947.

The spelling of 98987638 in words is "ninety-eight million, nine hundred eighty-seven thousand, six hundred thirty-eight".