634342140 has 72 divisors (see below), whose sum is σ = 1939392000. Its totient is φ = 167819904.

The previous prime is 634342129. The next prime is 634342147. The reversal of 634342140 is 41243436.

634342140 is a `hidden beast` number, since 634 + 3 + 4 + 21 + 4 + 0 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (634342147) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 8986 + ... + 36734.

It is an arithmetic number, because the mean of its divisors is an integer number (26936000).

Almost surely, 2^634342140 is an apocalyptic number.

634342140 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 634342140, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (969696000).

634342140 is an abundant number, since it is smaller than the sum of its proper divisors (1305049860).

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

634342140 is a wasteful number, since it uses less digits than its factorization.

634342140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27891 (or 27886 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 27.

The square root of 634342140 is about 25186.1497652976. The cubic root of 634342140 is about 859.2268786521.

Adding to 634342140 its reverse (41243436), we get a palindrome (675585576).

The spelling of 634342140 in words is "six hundred thirty-four million, three hundred forty-two thousand, one hundred forty".