638078414 has 4 divisors (see below), whose sum is σ = 957117624. Its totient is φ = 319039206.

The previous prime is 638078411. The next prime is 638078417. The reversal of 638078414 is 414870836.

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 (638078411) and next prime (638078417).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (638078411) by changing a digit.

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 as a sum of consecutive naturals, namely, 159519602 + ... + 159519605.

It is an arithmetic number, because the mean of its divisors is an integer number (239279406).

Almost surely, 2^638078414 is an apocalyptic number.

638078414 is a deficient number, since it is larger than the sum of its proper divisors (319039210).

638078414 is a wasteful number, since it uses less digits than its factorization.

638078414 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 319039209.

The product of its (nonzero) digits is 129024, while the sum is 41.

The square root of 638078414 is about 25260.2140529331. The cubic root of 638078414 is about 860.9105256347.

The spelling of 638078414 in words is "six hundred thirty-eight million, seventy-eight thousand, four hundred fourteen".