634404436 has 12 divisors (see below), whose sum is σ = 1175514228. Its totient is φ = 298543232.

The previous prime is 634404431. The next prime is 634404437.

634404436 is nontrivially palindromic in base 10.

It can be written as a sum of positive squares in 2 ways, for example, as 564347536 + 70056900 = 23756^2 + 8370^2 .

It is a Harshad number since it is a multiple of its sum of digits (34).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (634404431) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4664671 + ... + 4664806.

It is an arithmetic number, because the mean of its divisors is an integer number (97959519).

Almost surely, 2^634404436 is an apocalyptic number.

It is an amenable number.

634404436 is a deficient number, since it is larger than the sum of its proper divisors (541109792).

634404436 is a wasteful number, since it uses less digits than its factorization.

634404436 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9329498 (or 9329496 counting only the distinct ones).

The product of its (nonzero) digits is 82944, while the sum is 34.

The square root of 634404436 is about 25187.3864463942. The cubic root of 634404436 is about 859.2550047175.

It can be divided in two parts, 63440 and 4436, that added together give a palindrome (67876).

The spelling of 634404436 in words is "six hundred thirty-four million, four hundred four thousand, four hundred thirty-six".