197428154 has 48 divisors (see below), whose sum is σ = 377584416. Its totient is φ = 76557600.

The previous prime is 197428117. The next prime is 197428177. The reversal of 197428154 is 451824791.

197428154 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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, 401849 + ... + 402339.

It is an arithmetic number, because the mean of its divisors is an integer number (7866342).

Almost surely, 2^197428154 is an apocalyptic number.

197428154 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

197428154 is a deficient number, since it is larger than the sum of its proper divisors (180156262).

197428154 is a wasteful number, since it uses less digits than its factorization.

197428154 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 891 (or 884 counting only the distinct ones).

The product of its digits is 80640, while the sum is 41.

The square root of 197428154 is about 14050.9129240772. The cubic root of 197428154 is about 582.2860176655.

The spelling of 197428154 in words is "one hundred ninety-seven million, four hundred twenty-eight thousand, one hundred fifty-four".