634873540 has 48 divisors (see below), whose sum is σ = 1527184512. Its totient is φ = 217172736.

The previous prime is 634873537. The next prime is 634873541. The reversal of 634873540 is 45378436.

It is a junction number, because it is equal to n+sod(n) for n = 634873493 and 634873502.

It is not an unprimeable number, because it can be changed into a prime (634873541) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 59019 + ... + 68941.

It is an arithmetic number, because the mean of its divisors is an integer number (31816344).

Almost surely, 2^634873540 is an apocalyptic number.

It is an amenable number.

634873540 is an abundant number, since it is smaller than the sum of its proper divisors (892310972).

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

634873540 is a wasteful number, since it uses less digits than its factorization.

634873540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10396 (or 10394 counting only the distinct ones).

The product of its (nonzero) digits is 241920, while the sum is 40.

The square root of 634873540 is about 25196.6970057585. The cubic root of 634873540 is about 859.4667417034.

The spelling of 634873540 in words is "six hundred thirty-four million, eight hundred seventy-three thousand, five hundred forty".