636428632 has 32 divisors (see below), whose sum is σ = 1369113120. Its totient is φ = 271687680.

The previous prime is 636428627. The next prime is 636428633. The reversal of 636428632 is 236824636.

636428632 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-3 number, since 3×636428632³ (a number of 27 digits) contains 333 as substring.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (636428633) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7719 + ... + 36502.

It is an arithmetic number, because the mean of its divisors is an integer number (42784785).

Almost surely, 2^636428632 is an apocalyptic number.

It is an amenable number.

636428632 is an abundant number, since it is smaller than the sum of its proper divisors (732684488).

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

636428632 is a wasteful number, since it uses less digits than its factorization.

636428632 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44491 (or 44487 counting only the distinct ones).

The product of its digits is 248832, while the sum is 40.

The square root of 636428632 is about 25227.5371766647. The cubic root of 636428632 is about 860.1679102466.

The spelling of 636428632 in words is "six hundred thirty-six million, four hundred twenty-eight thousand, six hundred thirty-two".