98288721 has 20 divisors (see below), whose sum is σ = 147668400. Its totient is φ = 65150136.

The previous prime is 98288699. The next prime is 98288731. The reversal of 98288721 is 12788289.

It is a happy number.

It is not a de Polignac number, because 98288721 - 2⁶ = 98288657 is a prime.

It is not an unprimeable number, because it can be changed into a prime (98288731) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 11110 + ... + 17888.

It is an arithmetic number, because the mean of its divisors is an integer number (7383420).

Almost surely, 2^98288721 is an apocalyptic number.

It is an amenable number.

98288721 is a deficient number, since it is larger than the sum of its proper divisors (49379679).

98288721 is a wasteful number, since it uses less digits than its factorization.

98288721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6970 (or 6961 counting only the distinct ones).

The product of its digits is 129024, while the sum is 45.

The square root of 98288721 is about 9914.0668244671. The cubic root of 98288721 is about 461.4959505269.

The spelling of 98288721 in words is "ninety-eight million, two hundred eighty-eight thousand, seven hundred twenty-one".