634214440 has 16 divisors (see below), whose sum is σ = 1426982580. Its totient is φ = 253685760.

The previous prime is 634214417. The next prime is 634214459. The reversal of 634214440 is 44412436.

It can be written as a sum of positive squares in 2 ways, for example, as 597998116 + 36216324 = 24454^2 + 6018^2 .

It is a super-3 number, since 3×634214440³ (a number of 27 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 634214399 and 634214408.

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 3 ways as a sum of consecutive naturals, for example, 7927641 + ... + 7927720.

Almost surely, 2^634214440 is an apocalyptic number.

It is an amenable number.

634214440 is an abundant number, since it is smaller than the sum of its proper divisors (792768140).

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

634214440 is a wasteful number, since it uses less digits than its factorization.

634214440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15855372 (or 15855368 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 28.

The square root of 634214440 is about 25183.6145142035. The cubic root of 634214440 is about 859.1692175314.

Adding to 634214440 its reverse (44412436), we get a palindrome (678626876).

The spelling of 634214440 in words is "six hundred thirty-four million, two hundred fourteen thousand, four hundred forty".