634740 has 48 divisors (see below), whose sum is σ = 1814400. Its totient is φ = 165760.

The previous prime is 634727. The next prime is 634741. The reversal of 634740 is 47436.

It is a nialpdrome in base 15.

It is a self number, because there is not a number n which added to its sum of digits gives 634740.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (634741) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4186 + ... + 4334.

It is an arithmetic number, because the mean of its divisors is an integer number (37800).

2⁶³⁴⁷⁴⁰ is an apocalyptic number.

634740 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 634740, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (907200).

634740 is an abundant number, since it is smaller than the sum of its proper divisors (1179660).

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

634740 is a wasteful number, since it uses less digits than its factorization.

634740 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 232 (or 230 counting only the distinct ones).

The product of its (nonzero) digits is 2016, while the sum is 24.

The square root of 634740 is about 796.7057173135. The cubic root of 634740 is about 85.9406477084.

Adding to 634740 its product of nonzero digits (2016), we get a triangular number (636756 = T₁₁₂₈).

The spelling of 634740 in words is "six hundred thirty-four thousand, seven hundred forty".