638069214 has 32 divisors (see below), whose sum is σ = 1297296000. Its totient is φ = 209192544.

The previous prime is 638069189. The next prime is 638069239. The reversal of 638069214 is 412960836.

It is an interprime number because it is at equal distance from previous prime (638069189) and next prime (638069239).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 87397 + ... + 94415.

It is an arithmetic number, because the mean of its divisors is an integer number (40540500).

Almost surely, 2^638069214 is an apocalyptic number.

638069214 is an abundant number, since it is smaller than the sum of its proper divisors (659226786).

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

638069214 is a wasteful number, since it uses less digits than its factorization.

638069214 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7272.

The product of its (nonzero) digits is 62208, while the sum is 39.

The square root of 638069214 is about 25260.0319477233. The cubic root of 638069214 is about 860.9063879954.

The spelling of 638069214 in words is "six hundred thirty-eight million, sixty-nine thousand, two hundred fourteen".