634649850 has 96 divisors (see below), whose sum is σ = 1755512640. Its totient is φ = 168592320.

The previous prime is 634649839. The next prime is 634649867. The reversal of 634649850 is 58946436.

634649850 is a `hidden beast` number, since 634 + 6 + 4 + 9 + 8 + 5 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a junction number, because it is equal to n+sod(n) for n = 634649796 and 634649805.

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, 427209 + ... + 428691.

It is an arithmetic number, because the mean of its divisors is an integer number (18286590).

Almost surely, 2^634649850 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 634649850, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (877756320).

634649850 is an abundant number, since it is smaller than the sum of its proper divisors (1120862790).

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

634649850 is a wasteful number, since it uses less digits than its factorization.

634649850 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1821 (or 1810 counting only the distinct ones).

The product of its (nonzero) digits is 622080, while the sum is 45.

The square root of 634649850 is about 25192.2577392341. The cubic root of 634649850 is about 859.3657889481.

The spelling of 634649850 in words is "six hundred thirty-four million, six hundred forty-nine thousand, eight hundred fifty".