638277034 has 4 divisors (see below), whose sum is σ = 957415554. Its totient is φ = 319138516.

The previous prime is 638276987. The next prime is 638277043. The reversal of 638277034 is 430772836.

It is a happy number.

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

It can be written as a sum of positive squares in only one way, i.e., 622253025 + 16024009 = 24945^2 + 4003^2 .

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 159569257 + ... + 159569260.

Almost surely, 2^638277034 is an apocalyptic number.

638277034 is a deficient number, since it is larger than the sum of its proper divisors (319138520).

638277034 is a wasteful number, since it uses less digits than its factorization.

638277034 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 319138519.

The product of its (nonzero) digits is 169344, while the sum is 40.

The square root of 638277034 is about 25264.1452259917. The cubic root of 638277034 is about 860.9998439722. Note that the first 3 decimals are identical.

The spelling of 638277034 in words is "six hundred thirty-eight million, two hundred seventy-seven thousand, thirty-four".