642014198 has 32 divisors (see below), whose sum is σ = 1120512000. Its totient is φ = 270208224.

The previous prime is 642014189. The next prime is 642014201. The reversal of 642014198 is 891410246.

It is a happy number.

It is a congruent number.

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, 218636 + ... + 221552.

It is an arithmetic number, because the mean of its divisors is an integer number (35016000).

Almost surely, 2^642014198 is an apocalyptic number.

642014198 is a deficient number, since it is larger than the sum of its proper divisors (478497802).

642014198 is a wasteful number, since it uses less digits than its factorization.

642014198 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3204.

The product of its (nonzero) digits is 13824, while the sum is 35.

The square root of 642014198 is about 25337.9990922725. Note that the first 3 decimals coincide. The cubic root of 642014198 is about 862.6769830187.

The spelling of 642014198 in words is "six hundred forty-two million, fourteen thousand, one hundred ninety-eight".