634463540 has 24 divisors (see below), whose sum is σ = 1333162152. Its totient is φ = 253635200.

The previous prime is 634463527. The next prime is 634463551. The reversal of 634463540 is 45364436.

It can be written as a sum of positive squares in 4 ways, for example, as 307721764 + 326741776 = 17542^2 + 18076^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 634463540.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 29090 + ... + 45990.

It is an arithmetic number, because the mean of its divisors is an integer number (55548423).

Almost surely, 2^634463540 is an apocalyptic number.

It is an amenable number.

634463540 is an abundant number, since it is smaller than the sum of its proper divisors (698698612).

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

634463540 is a wasteful number, since it uses less digits than its factorization.

634463540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18787 (or 18785 counting only the distinct ones).

The product of its (nonzero) digits is 103680, while the sum is 35.

The square root of 634463540 is about 25188.5597047549. The cubic root of 634463540 is about 859.2816879224.

The spelling of 634463540 in words is "six hundred thirty-four million, four hundred sixty-three thousand, five hundred forty".