98628781 has 8 divisors (see below), whose sum is σ = 104792184. Its totient is φ = 92505600.

The previous prime is 98628769. The next prime is 98628811. The reversal of 98628781 is 18782689.

It can be written as a sum of positive squares in 4 ways, for example, as 17015625 + 81613156 = 4125^2 + 9034^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 98628781 - 2⁵ = 98628749 is a prime.

It is a super-2 number, since 2×98628781² = 19455272883091922, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (98628731) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4920 + ... + 14881.

It is an arithmetic number, because the mean of its divisors is an integer number (13099023).

Almost surely, 2^98628781 is an apocalyptic number.

It is an amenable number.

98628781 is a deficient number, since it is larger than the sum of its proper divisors (6163403).

98628781 is a wasteful number, since it uses less digits than its factorization.

98628781 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20111.

The product of its digits is 387072, while the sum is 49.

The square root of 98628781 is about 9931.2023944737. The cubic root of 98628781 is about 462.0275668664.

The spelling of 98628781 in words is "ninety-eight million, six hundred twenty-eight thousand, seven hundred eighty-one".