98028781 has 4 divisors (see below), whose sum is σ = 98160064. Its totient is φ = 97897500.

The previous prime is 98028767. The next prime is 98028857. The reversal of 98028781 is 18782089.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-98028781 is a prime.

It is a super-2 number, since 2×98028781² = 19219283808691922, which contains 22 as substring.

It is a Duffinian number.

It is a zygodrome in base 9.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (98028731) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 64515 + ... + 66016.

It is an arithmetic number, because the mean of its divisors is an integer number (24540016).

Almost surely, 2^98028781 is an apocalyptic number.

It is an amenable number.

98028781 is a deficient number, since it is larger than the sum of its proper divisors (131283).

98028781 is a wasteful number, since it uses less digits than its factorization.

98028781 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 131282.

The product of its (nonzero) digits is 64512, while the sum is 43.

The square root of 98028781 is about 9900.9484899175. The cubic root of 98028781 is about 461.0887584504.

The spelling of 98028781 in words is "ninety-eight million, twenty-eight thousand, seven hundred eighty-one".