634256970 has 96 divisors (see below), whose sum is σ = 1646566272. Its totient is φ = 156059904.

The previous prime is 634256969. The next prime is 634256971. The reversal of 634256970 is 79652436.

It is an interprime number because it is at equal distance from previous prime (634256969) and next prime (634256971).

It is not an unprimeable number, because it can be changed into a prime (634256971) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 579744 + ... + 580836.

It is an arithmetic number, because the mean of its divisors is an integer number (17151732).

Almost surely, 2^634256970 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 634256970, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (823283136).

634256970 is an abundant number, since it is smaller than the sum of its proper divisors (1012309302).

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

634256970 is a wasteful number, since it uses less digits than its factorization.

634256970 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1184 (or 1155 counting only the distinct ones).

The product of its (nonzero) digits is 272160, while the sum is 42.

The square root of 634256970 is about 25184.4588982968. The cubic root of 634256970 is about 859.1884222082.

The spelling of 634256970 in words is "six hundred thirty-four million, two hundred fifty-six thousand, nine hundred seventy".