197991948 has 96 divisors (see below), whose sum is σ = 587865600. Its totient is φ = 51414720.

The previous prime is 197991931. The next prime is 197991967. The reversal of 197991948 is 849199791.

197991948 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×197991948² = 78401622945669408, which contains 22 as substring.

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, 43090 + ... + 47462.

It is an arithmetic number, because the mean of its divisors is an integer number (6123600).

Almost surely, 2^197991948 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 197991948, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (293932800).

197991948 is an abundant number, since it is smaller than the sum of its proper divisors (389873652).

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

197991948 is a wasteful number, since it uses less digits than its factorization.

197991948 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4412 (or 4396 counting only the distinct ones).

The product of its digits is 1469664, while the sum is 57.

The square root of 197991948 is about 14070.9611612000. The cubic root of 197991948 is about 582.8397673941.

The spelling of 197991948 in words is "one hundred ninety-seven million, nine hundred ninety-one thousand, nine hundred forty-eight".