199272642 has 16 divisors (see below), whose sum is σ = 398768832. Its totient is φ = 66386960.

The previous prime is 199272617. The next prime is 199272649. The reversal of 199272642 is 246272991.

It is a junction number, because it is equal to n+sod(n) for n = 199272594 and 199272603.

It is not an unprimeable number, because it can be changed into a prime (199272649) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3667 + ... + 20297.

It is an arithmetic number, because the mean of its divisors is an integer number (24923052).

Almost surely, 2^199272642 is an apocalyptic number.

199272642 is an abundant number, since it is smaller than the sum of its proper divisors (199496190).

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

199272642 is a wasteful number, since it uses less digits than its factorization.

199272642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18633.

The product of its digits is 108864, while the sum is 42.

The square root of 199272642 is about 14116.3962114982. The cubic root of 199272642 is about 584.0937505869.

The spelling of 199272642 in words is "one hundred ninety-nine million, two hundred seventy-two thousand, six hundred forty-two".