78098904 has 160 divisors (see below), whose sum is σ = 240683520. Its totient is φ = 23514624.

The previous prime is 78098899. The next prime is 78098921. The reversal of 78098904 is 40989087.

It is a self number, because there is not a number n which added to its sum of digits gives 78098904.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 614889 + ... + 615015.

It is an arithmetic number, because the mean of its divisors is an integer number (1504272).

Almost surely, 2^78098904 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 78098904, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (120341760).

78098904 is an abundant number, since it is smaller than the sum of its proper divisors (162584616).

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

78098904 is a wasteful number, since it uses less digits than its factorization.

78098904 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 231 (or 218 counting only the distinct ones).

The product of its (nonzero) digits is 145152, while the sum is 45.

The square root of 78098904 is about 8837.3584288519. The cubic root of 78098904 is about 427.4463829340.

The spelling of 78098904 in words is "seventy-eight million, ninety-eight thousand, nine hundred four".