197987904 has 168 divisors, whose sum is σ = 607568000. Its totient is φ = 61461504.

The previous prime is 197987903. The next prime is 197987963. The reversal of 197987904 is 409789791.

It is not an unprimeable number, because it can be changed into a prime (197987903) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 864462 + ... + 864690.

Almost surely, 2^197987904 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 197987904, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (303784000).

197987904 is an abundant number, since it is smaller than the sum of its proper divisors (409580096).

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

197987904 is a wasteful number, since it uses less digits than its factorization.

197987904 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 345 (or 332 counting only the distinct ones).

The product of its (nonzero) digits is 1143072, while the sum is 54.

The square root of 197987904 is about 14070.8174602615. The cubic root of 197987904 is about 582.8357991855.

It can be divided in two parts, 197987 and 904, that added together give a palindrome (198891).

The spelling of 197987904 in words is "one hundred ninety-seven million, nine hundred eighty-seven thousand, nine hundred four".