197855028 has 48 divisors (see below), whose sum is σ = 586239360. Its totient is φ = 56529792.

The previous prime is 197855003. The next prime is 197855029. The reversal of 197855028 is 820558791.

It is a happy number.

197855028 is a `hidden beast` number, since 1 + 9 + 78 + 550 + 28 = 666.

197855028 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×197855028² = 78293224209761568, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (197855029) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 130101 + ... + 131612.

It is an arithmetic number, because the mean of its divisors is an integer number (12213320).

Almost surely, 2^197855028 is an apocalyptic number.

197855028 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

197855028 is an abundant number, since it is smaller than the sum of its proper divisors (388384332).

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

197855028 is a wasteful number, since it uses less digits than its factorization.

197855028 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 261733 (or 261725 counting only the distinct ones).

The product of its (nonzero) digits is 201600, while the sum is 45.

The square root of 197855028 is about 14066.0949804841. The cubic root of 197855028 is about 582.7053834382.

The spelling of 197855028 in words is "one hundred ninety-seven million, eight hundred fifty-five thousand, twenty-eight".