634138 has 8 divisors (see below), whose sum is σ = 955188. Its totient is φ = 315744.

The previous prime is 634103. The next prime is 634141. The reversal of 634138 is 831436.

634138 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 356409 + 277729 = 597^2 + 527^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 120 + ... + 1132.

2⁶³⁴¹³⁸ is an apocalyptic number.

634138 is a deficient number, since it is larger than the sum of its proper divisors (321050).

634138 is a wasteful number, since it uses less digits than its factorization.

634138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1328.

The product of its digits is 1728, while the sum is 25.

The square root of 634138 is about 796.3278219427. The cubic root of 634138 is about 85.9134698432.

The spelling of 634138 in words is "six hundred thirty-four thousand, one hundred thirty-eight".