197999940 has 48 divisors (see below), whose sum is σ = 558411840. Its totient is φ = 52417920.

The previous prime is 197999927. The next prime is 197999953. The reversal of 197999940 is 49999791.

It is an interprime number because it is at equal distance from previous prime (197999927) and next prime (197999953).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3531 + ... + 20210.

It is an arithmetic number, because the mean of its divisors is an integer number (11633580).

Almost surely, 2^197999940 is an apocalyptic number.

197999940 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

197999940 is an abundant number, since it is smaller than the sum of its proper divisors (360411900).

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

197999940 is a wasteful number, since it uses less digits than its factorization.

197999940 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23892 (or 23890 counting only the distinct ones).

The product of its (nonzero) digits is 1653372, while the sum is 57.

The square root of 197999940 is about 14071.2451474630. The cubic root of 197999940 is about 582.8476094516.

The spelling of 197999940 in words is "one hundred ninety-seven million, nine hundred ninety-nine thousand, nine hundred forty".