98981878 has 4 divisors (see below), whose sum is σ = 148472820. Its totient is φ = 49490938.

The previous prime is 98981863. The next prime is 98981879. The reversal of 98981878 is 87818989.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 87818989 = 29 ⋅3028241.

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 (98981879) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 24745468 + ... + 24745471.

It is an arithmetic number, because the mean of its divisors is an integer number (37118205).

Almost surely, 2^98981878 is an apocalyptic number.

98981878 is a deficient number, since it is larger than the sum of its proper divisors (49490942).

98981878 is a wasteful number, since it uses less digits than its factorization.

98981878 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49490941.

The product of its digits is 2322432, while the sum is 58.

The square root of 98981878 is about 9948.9636646236. The cubic root of 98981878 is about 462.5782724112.

The spelling of 98981878 in words is "ninety-eight million, nine hundred eighty-one thousand, eight hundred seventy-eight".