638974314 has 24 divisors (see below), whose sum is σ = 1510303392. Its totient is φ = 193628520.

The previous prime is 638974277. The next prime is 638974319. The reversal of 638974314 is 413479836.

638974314 is a `hidden beast` number, since 638 + 9 + 7 + 4 + 3 + 1 + 4 = 666.

It is a self number, because there is not a number n which added to its sum of digits gives 638974314.

It is not an unprimeable number, because it can be changed into a prime (638974319) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1613374 + ... + 1613769.

It is an arithmetic number, because the mean of its divisors is an integer number (62929308).

Almost surely, 2^638974314 is an apocalyptic number.

638974314 is an abundant number, since it is smaller than the sum of its proper divisors (871329078).

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

638974314 is a wasteful number, since it uses less digits than its factorization.

638974314 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3227162 (or 3227159 counting only the distinct ones).

The product of its digits is 435456, while the sum is 45.

The square root of 638974314 is about 25277.9412531954. The cubic root of 638974314 is about 861.3132603798.

The spelling of 638974314 in words is "six hundred thirty-eight million, nine hundred seventy-four thousand, three hundred fourteen".