634378026 has 8 divisors (see below), whose sum is σ = 1268756064. Its totient is φ = 211459340.

The previous prime is 634378009. The next prime is 634378033. The reversal of 634378026 is 620873436.

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

634378026 is an admirable number.

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, 52864830 + ... + 52864841.

It is an arithmetic number, because the mean of its divisors is an integer number (158594508).

Almost surely, 2^634378026 is an apocalyptic number.

634378026 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

634378026 is a wasteful number, since it uses less digits than its factorization.

634378026 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 105729676.

The product of its (nonzero) digits is 145152, while the sum is 39.

The square root of 634378026 is about 25186.8621705841. The cubic root of 634378026 is about 859.2430810726.

The spelling of 634378026 in words is "six hundred thirty-four million, three hundred seventy-eight thousand, twenty-six".