634151140 has 72 divisors (see below), whose sum is σ = 1591100280. Its totient is φ = 211534848.

The previous prime is 634151131. The next prime is 634151171. The reversal of 634151140 is 41151436.

It can be written as a sum of positive squares in 4 ways, for example, as 18714276 + 615436864 = 4326^2 + 24808^2 .

It is a congruent number.

It is an unprimeable number.

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 in 23 ways as a sum of consecutive naturals, for example, 27516 + ... + 45004.

It is an arithmetic number, because the mean of its divisors is an integer number (22098615).

Almost surely, 2^634151140 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 634151140, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (795550140).

634151140 is an abundant number, since it is smaller than the sum of its proper divisors (956949140).

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

634151140 is a wasteful number, since it uses less digits than its factorization.

634151140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17549 (or 17540 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 25.

The square root of 634151140 is about 25182.3577132881. The cubic root of 634151140 is about 859.1406324464.

The spelling of 634151140 in words is "six hundred thirty-four million, one hundred fifty-one thousand, one hundred forty".