638052286 has 4 divisors (see below), whose sum is σ = 957078432. Its totient is φ = 319026142.

The previous prime is 638052271. The next prime is 638052301. The reversal of 638052286 is 682250836.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (638052271) and next prime (638052301).

It is a super-2 number, since 2×638052286² = 814221439339651592, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 159513070 + ... + 159513073.

It is an arithmetic number, because the mean of its divisors is an integer number (239269608).

Almost surely, 2^638052286 is an apocalyptic number.

638052286 is a deficient number, since it is larger than the sum of its proper divisors (319026146).

638052286 is a wasteful number, since it uses less digits than its factorization.

638052286 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 319026145.

The product of its (nonzero) digits is 138240, while the sum is 40.

The square root of 638052286 is about 25259.6968707069. The cubic root of 638052286 is about 860.8987746353.

The spelling of 638052286 in words is "six hundred thirty-eight million, fifty-two thousand, two hundred eighty-six".