198977642 has 32 divisors (see below), whose sum is σ = 315964800. Its totient is φ = 93844800.

The previous prime is 198977627. The next prime is 198977663. The reversal of 198977642 is 246779891.

198977642 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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, 868784 + ... + 869012.

It is an arithmetic number, because the mean of its divisors is an integer number (9873900).

Almost surely, 2^198977642 is an apocalyptic number.

198977642 is a deficient number, since it is larger than the sum of its proper divisors (116987158).

198977642 is a wasteful number, since it uses less digits than its factorization.

198977642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 542.

The product of its digits is 1524096, while the sum is 53.

The square root of 198977642 is about 14105.9434991070. The cubic root of 198977642 is about 583.8053805899.

The spelling of 198977642 in words is "one hundred ninety-eight million, nine hundred seventy-seven thousand, six hundred forty-two".