78098898 has 16 divisors (see below), whose sum is σ = 156284640. Its totient is φ = 26018496.

The previous prime is 78098887. The next prime is 78098899. The reversal of 78098898 is 89889087.

It is a super-5 number, since 5×78098898⁵ (a number of 41 digits) contains 55555 as substring.

It is not an unprimeable number, because it can be changed into a prime (78098899) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 18138 + ... + 22026.

It is an arithmetic number, because the mean of its divisors is an integer number (9767790).

Almost surely, 2^78098898 is an apocalyptic number.

78098898 is an abundant number, since it is smaller than the sum of its proper divisors (78185742).

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

78098898 is a wasteful number, since it uses less digits than its factorization.

78098898 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7241.

The product of its (nonzero) digits is 2322432, while the sum is 57.

The square root of 78098898 is about 8837.3580893840. The cubic root of 78098898 is about 427.4463719877.

The spelling of 78098898 in words is "seventy-eight million, ninety-eight thousand, eight hundred ninety-eight".