98078640 has 160 divisors (see below), whose sum is σ = 335978496. Its totient is φ = 23470080.

The previous prime is 98078633. The next prime is 98078663. The reversal of 98078640 is 4687089.

It is a happy number.

It is a hoax number, since the sum of its digits (42) coincides with the sum of the digits of its distinct prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 98078592 and 98078601.

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, 255889 + ... + 256271.

Almost surely, 2^98078640 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 98078640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (167989248).

98078640 is an abundant number, since it is smaller than the sum of its proper divisors (237899856).

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

98078640 is a wasteful number, since it uses less digits than its factorization.

98078640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 507 (or 501 counting only the distinct ones).

The product of its (nonzero) digits is 96768, while the sum is 42.

The square root of 98078640 is about 9903.4660599206. The cubic root of 98078640 is about 461.1669175641.

The spelling of 98078640 in words is "ninety-eight million, seventy-eight thousand, six hundred forty".