78208998 has 48 divisors (see below), whose sum is σ = 188250480. Its totient is φ = 21572544.

The previous prime is 78208981. The next prime is 78209023. The reversal of 78208998 is 89980287.

It is a super-2 number, since 2×78208998² = 12233294736328008, which contains 22 as substring.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 78208998.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3940 + ... + 13112.

It is an arithmetic number, because the mean of its divisors is an integer number (3921885).

Almost surely, 2^78208998 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 78208998, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (94125240).

78208998 is an abundant number, since it is smaller than the sum of its proper divisors (110041482).

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

78208998 is a wasteful number, since it uses less digits than its factorization.

78208998 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9221 (or 9214 counting only the distinct ones).

The product of its (nonzero) digits is 580608, while the sum is 51.

The square root of 78208998 is about 8843.5851327389. The cubic root of 78208998 is about 427.6471419896.

The spelling of 78208998 in words is "seventy-eight million, two hundred eight thousand, nine hundred ninety-eight".