252537638 has 4 divisors (see below), whose sum is σ = 378806460. Its totient is φ = 126268818.

The previous prime is 252537629. The next prime is 252537643. The reversal of 252537638 is 836735252.

It is a semiprime because it is the product of two primes.

It is a junction number, because it is equal to n+sod(n) for n = 252537595 and 252537604.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 63134408 + ... + 63134411.

It is an arithmetic number, because the mean of its divisors is an integer number (94701615).

Almost surely, 2^252537638 is an apocalyptic number.

252537638 is a deficient number, since it is larger than the sum of its proper divisors (126268822).

252537638 is a wasteful number, since it uses less digits than its factorization.

252537638 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 126268821.

The product of its digits is 302400, while the sum is 41.

The square root of 252537638 is about 15891.4328491801. The cubic root of 252537638 is about 632.0848357916.

The spelling of 252537638 in words is "two hundred fifty-two million, five hundred thirty-seven thousand, six hundred thirty-eight".