634681042 has 16 divisors (see below), whose sum is σ = 1001279232. Its totient is φ = 301307760.

The previous prime is 634681031. The next prime is 634681051. The reversal of 634681042 is 240186436.

It is a junction number, because it is equal to n+sod(n) for n = 634680989 and 634681007.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 93288 + ... + 99859.

It is an arithmetic number, because the mean of its divisors is an integer number (62579952).

Almost surely, 2^634681042 is an apocalyptic number.

634681042 is a gapful number since it is divisible by the number (62) formed by its first and last digit.

634681042 is a deficient number, since it is larger than the sum of its proper divisors (366598190).

634681042 is a wasteful number, since it uses less digits than its factorization.

634681042 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 193233.

The product of its (nonzero) digits is 27648, while the sum is 34.

The square root of 634681042 is about 25192.8768107177. The cubic root of 634681042 is about 859.3798675242.

The spelling of 634681042 in words is "six hundred thirty-four million, six hundred eighty-one thousand, forty-two".