633540042 has 40 divisors (see below), whose sum is σ = 1422046692. Its totient is φ = 210816000.

The previous prime is 633540023. The next prime is 633540073. The reversal of 633540042 is 240045336.

It can be written as a sum of positive squares in 2 ways, for example, as 577873521 + 55666521 = 24039^2 + 7461^2 .

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a junction number, because it is equal to n+sod(n) for n = 633539988 and 633540015.

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 100792 + ... + 106892.

Almost surely, 2^633540042 is an apocalyptic number.

633540042 is an abundant number, since it is smaller than the sum of its proper divisors (788506650).

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

633540042 is a wasteful number, since it uses less digits than its factorization.

633540042 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6756 (or 6747 counting only the distinct ones).

The product of its (nonzero) digits is 8640, while the sum is 27.

The square root of 633540042 is about 25170.2213339494. The cubic root of 633540042 is about 858.8645742516.

Adding to 633540042 its reverse (240045336), we get a palindrome (873585378).

The spelling of 633540042 in words is "six hundred thirty-three million, five hundred forty thousand, forty-two".