197996400 has 420 divisors, whose sum is σ = 823492432. Its totient is φ = 44789760.

The previous prime is 197996387. The next prime is 197996401. The reversal of 197996400 is 4699791.

It is a tau number, because it is divible by the number of its divisors (420).

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (197996401) by changing a digit.

It is a polite number, since it can be written in 83 ways as a sum of consecutive naturals, for example, 2041152 + ... + 2041248.

Almost surely, 2^197996400 is an apocalyptic number.

197996400 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 197996400, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (411746216).

197996400 is an abundant number, since it is smaller than the sum of its proper divisors (625496032).

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

197996400 is an equidigital number, since it uses as much as digits as its factorization.

197996400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 140 (or 114 counting only the distinct ones).

The product of its (nonzero) digits is 122472, while the sum is 45.

The square root of 197996400 is about 14071.1193584590. The cubic root of 197996400 is about 582.8441358936.

The spelling of 197996400 in words is "one hundred ninety-seven million, nine hundred ninety-six thousand, four hundred".