197649900 has 216 divisors, whose sum is σ = 716308320. Its totient is φ = 44651520.

The previous prime is 197649883. The next prime is 197649901. The reversal of 197649900 is 9946791.

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

It is not an unprimeable number, because it can be changed into a prime (197649901) by changing a digit.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 862986 + ... + 863214.

Almost surely, 2^197649900 is an apocalyptic number.

197649900 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 197649900, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (358154160).

197649900 is an abundant number, since it is smaller than the sum of its proper divisors (518658420).

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

197649900 is a wasteful number, since it uses less digits than its factorization.

197649900 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 393 (or 383 counting only the distinct ones).

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

The square root of 197649900 is about 14058.8015136426. The cubic root of 197649900 is about 582.5039387701.

The spelling of 197649900 in words is "one hundred ninety-seven million, six hundred forty-nine thousand, nine hundred".