98391840 has 48 divisors (see below), whose sum is σ = 309935808. Its totient is φ = 26237696.

The previous prime is 98391827. The next prime is 98391851. The reversal of 98391840 is 4819389.

It is a tau number, because it is divible by the number of its divisors (48).

It is a junction number, because it is equal to n+sod(n) for n = 98391792 and 98391801.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 102012 + ... + 102971.

It is an arithmetic number, because the mean of its divisors is an integer number (6456996).

Almost surely, 2^98391840 is an apocalyptic number.

It is an amenable number.

98391840 is an abundant number, since it is smaller than the sum of its proper divisors (211543968).

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

98391840 is a wasteful number, since it uses less digits than its factorization.

98391840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 205001 (or 204993 counting only the distinct ones).

The product of its (nonzero) digits is 62208, while the sum is 42.

The square root of 98391840 is about 9919.2661018848. The cubic root of 98391840 is about 461.6572859869.

The spelling of 98391840 in words is "ninety-eight million, three hundred ninety-one thousand, eight hundred forty".