197942904628 has 96 divisors (see below), whose sum is σ = 430818877440. Its totient is φ = 77656993920.

The previous prime is 197942904617. The next prime is 197942904631. The reversal of 197942904628 is 826409249791.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 11255250 + ... + 11272822.

It is an arithmetic number, because the mean of its divisors is an integer number (4487696640).

Almost surely, 2^197942904628 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 197942904628, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (215409438720).

197942904628 is an abundant number, since it is smaller than the sum of its proper divisors (232875972812).

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

197942904628 is a wasteful number, since it uses less digits than its factorization.

197942904628 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18317 (or 18315 counting only the distinct ones).

The product of its (nonzero) digits is 15676416, while the sum is 61.

The spelling of 197942904628 in words is "one hundred ninety-seven billion, nine hundred forty-two million, nine hundred four thousand, six hundred twenty-eight".