98717640 has 256 divisors, whose sum is σ = 371589120. Its totient is φ = 20459520.

The previous prime is 98717639. The next prime is 98717687. The reversal of 98717640 is 4671789.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a junction number, because it is equal to n+sod(n) for n = 98717592 and 98717601.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 442569 + ... + 442791.

It is an arithmetic number, because the mean of its divisors is an integer number (1451520).

Almost surely, 2^98717640 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 98717640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (185794560).

98717640 is an abundant number, since it is smaller than the sum of its proper divisors (272871480).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

98717640 is a wasteful number, since it uses less digits than its factorization.

98717640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 292 (or 288 counting only the distinct ones).

The product of its (nonzero) digits is 84672, while the sum is 42.

The square root of 98717640 is about 9935.6751154615. The cubic root of 98717640 is about 462.1662788590.

The spelling of 98717640 in words is "ninety-eight million, seven hundred seventeen thousand, six hundred forty".