634834620 has 144 divisors (see below), whose sum is σ = 2210120640. Its totient is φ = 144488448.

The previous prime is 634834619. The next prime is 634834637. The reversal of 634834620 is 26438436.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 338004 + ... + 339876.

It is an arithmetic number, because the mean of its divisors is an integer number (15348060).

Almost surely, 2^634834620 is an apocalyptic number.

634834620 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 634834620, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1105060320).

634834620 is an abundant number, since it is smaller than the sum of its proper divisors (1575286020).

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

634834620 is a wasteful number, since it uses less digits than its factorization.

634834620 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2164 (or 2159 counting only the distinct ones).

The product of its (nonzero) digits is 82944, while the sum is 36.

The square root of 634834620 is about 25195.9246704700. The cubic root of 634834620 is about 859.4491785578.

The spelling of 634834620 in words is "six hundred thirty-four million, eight hundred thirty-four thousand, six hundred twenty".