634940412 has 48 divisors (see below), whose sum is σ = 1572615072. Its totient is φ = 198696960.

The previous prime is 634940407. The next prime is 634940417. The reversal of 634940412 is 214049436.

It is an interprime number because it is at equal distance from previous prime (634940407) and next prime (634940417).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (634940417) 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, 82188 + ... + 89580.

It is an arithmetic number, because the mean of its divisors is an integer number (32762814).

Almost surely, 2^634940412 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 634940412, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (786307536).

634940412 is an abundant number, since it is smaller than the sum of its proper divisors (937674660).

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

634940412 is a wasteful number, since it uses less digits than its factorization.

634940412 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7838 (or 7836 counting only the distinct ones).

The product of its (nonzero) digits is 20736, while the sum is 33.

The square root of 634940412 is about 25198.0239701450. The cubic root of 634940412 is about 859.4969168687.

Adding to 634940412 its reverse (214049436), we get a palindrome (848989848).

The spelling of 634940412 in words is "six hundred thirty-four million, nine hundred forty thousand, four hundred twelve".