196615878 has 16 divisors (see below), whose sum is σ = 397970496. Its totient is φ = 64748840.

The previous prime is 196615877. The next prime is 196615889. The reversal of 196615878 is 878516691.

196615878 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

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 196615878.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (196615877) 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, 196908 + ... + 197903.

It is an arithmetic number, because the mean of its divisors is an integer number (24873156).

Almost surely, 2^196615878 is an apocalyptic number.

196615878 is an abundant number, since it is smaller than the sum of its proper divisors (201354618).

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

196615878 is a wasteful number, since it uses less digits than its factorization.

196615878 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 394899.

The product of its digits is 725760, while the sum is 51.

The square root of 196615878 is about 14021.9783910831. The cubic root of 196615878 is about 581.4863561369.

The spelling of 196615878 in words is "one hundred ninety-six million, six hundred fifteen thousand, eight hundred seventy-eight".