197151840 has 192 divisors, whose sum is σ = 705438720. Its totient is φ = 51402240.

The previous prime is 197151833. The next prime is 197151841. The reversal of 197151840 is 48151791.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 197151795 and 197151804.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (197151841) 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, 202555 + ... + 203525.

It is an arithmetic number, because the mean of its divisors is an integer number (3674160).

Almost surely, 2^197151840 is an apocalyptic number.

197151840 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 197151840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (352719360).

197151840 is an abundant number, since it is smaller than the sum of its proper divisors (508286880).

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

197151840 is a wasteful number, since it uses less digits than its factorization.

197151840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1042 (or 1028 counting only the distinct ones).

The product of its (nonzero) digits is 10080, while the sum is 36.

The square root of 197151840 is about 14041.0768817780. The cubic root of 197151840 is about 582.0142413350.

The spelling of 197151840 in words is "one hundred ninety-seven million, one hundred fifty-one thousand, eight hundred forty".