98018640 has 160 divisors (see below), whose sum is σ = 352477440. Its totient is φ = 24989184.

The previous prime is 98018593. The next prime is 98018681. The reversal of 98018640 is 4681089.

It is a happy number.

98018640 is a `hidden beast` number, since 9 + 8 + 0 + 1 + 8 + 640 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 98018595 and 98018604.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 48694 + ... + 50666.

It is an arithmetic number, because the mean of its divisors is an integer number (2202984).

Almost surely, 2^98018640 is an apocalyptic number.

98018640 is a gapful number since it is divisible by the number (90) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 98018640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (176238720).

98018640 is an abundant number, since it is smaller than the sum of its proper divisors (254458800).

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

98018640 is a wasteful number, since it uses less digits than its factorization.

98018640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2018 (or 2006 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 36.

The square root of 98018640 is about 9900.4363540200. The cubic root of 98018640 is about 461.0728581461.

The spelling of 98018640 in words is "ninety-eight million, eighteen thousand, six hundred forty".