199742380 has 12 divisors (see below), whose sum is σ = 419459040. Its totient is φ = 79896944.

The previous prime is 199742363. The next prime is 199742399. The reversal of 199742380 is 83247991.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4993540 + ... + 4993579.

It is an arithmetic number, because the mean of its divisors is an integer number (34954920).

Almost surely, 2^199742380 is an apocalyptic number.

199742380 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

199742380 is an abundant number, since it is smaller than the sum of its proper divisors (219716660).

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

199742380 is a wasteful number, since it uses less digits than its factorization.

199742380 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9987128 (or 9987126 counting only the distinct ones).

The product of its (nonzero) digits is 108864, while the sum is 43.

The square root of 199742380 is about 14133.0244463101. The cubic root of 199742380 is about 584.5523446036.

The spelling of 199742380 in words is "one hundred ninety-nine million, seven hundred forty-two thousand, three hundred eighty".