642018286 has 24 divisors (see below), whose sum is σ = 1206432360. Its totient is φ = 253984752.

The previous prime is 642018271. The next prime is 642018313. The reversal of 642018286 is 682810246.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 250696 + ... + 253243.

It is an arithmetic number, because the mean of its divisors is an integer number (50268015).

Almost surely, 2^642018286 is an apocalyptic number.

642018286 is a deficient number, since it is larger than the sum of its proper divisors (564414074).

642018286 is a wasteful number, since it uses less digits than its factorization.

642018286 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 503968 (or 503961 counting only the distinct ones).

The product of its (nonzero) digits is 36864, while the sum is 37.

The square root of 642018286 is about 25338.0797614973. The cubic root of 642018286 is about 862.6788140353.

The spelling of 642018286 in words is "six hundred forty-two million, eighteen thousand, two hundred eighty-six".