197494878 has 64 divisors (see below), whose sum is σ = 462938112. Its totient is φ = 55006560.

The previous prime is 197494877. The next prime is 197494879. The reversal of 197494878 is 878494791.

197494878 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (197494877) and next prime (197494879).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (197494877) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 306825 + ... + 307467.

It is an arithmetic number, because the mean of its divisors is an integer number (7233408).

Almost surely, 2^197494878 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 197494878, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (231469056).

197494878 is an abundant number, since it is smaller than the sum of its proper divisors (265443234).

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

197494878 is a wasteful number, since it uses less digits than its factorization.

197494878 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 829.

The product of its digits is 4064256, while the sum is 57.

The square root of 197494878 is about 14053.2870887917. The cubic root of 197494878 is about 582.3516078989.

The spelling of 197494878 in words is "one hundred ninety-seven million, four hundred ninety-four thousand, eight hundred seventy-eight".