634634028 has 120 divisors (see below), whose sum is σ = 1961652000. Its totient is φ = 175053312.

The previous prime is 634634023. The next prime is 634634051. The reversal of 634634028 is 820436436.

It is a happy number.

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

It is a junction number, because it is equal to n+sod(n) for n = 634633983 and 634634001.

It is not an unprimeable number, because it can be changed into a prime (634634023) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 60948 + ... + 70596.

It is an arithmetic number, because the mean of its divisors is an integer number (16347100).

Almost surely, 2^634634028 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 634634028, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (980826000).

634634028 is an abundant number, since it is smaller than the sum of its proper divisors (1327017972).

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

634634028 is a wasteful number, since it uses less digits than its factorization.

634634028 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9701 (or 9690 counting only the distinct ones).

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

The square root of 634634028 is about 25191.9437122267. The cubic root of 634634028 is about 859.3586474782.

The spelling of 634634028 in words is "six hundred thirty-four million, six hundred thirty-four thousand, twenty-eight".