684936238 has 32 divisors (see below), whose sum is σ = 1184947200. Its totient is φ = 290866464.

The previous prime is 684936233. The next prime is 684936253. The reversal of 684936238 is 832639486.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 684936191 and 684936200.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (684936233) 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, 926473 + ... + 927211.

It is an arithmetic number, because the mean of its divisors is an integer number (37029600).

Almost surely, 2^684936238 is an apocalyptic number.

684936238 is a deficient number, since it is larger than the sum of its proper divisors (500010962).

684936238 is a wasteful number, since it uses less digits than its factorization.

684936238 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1264.

The product of its digits is 1492992, while the sum is 49.

The square root of 684936238 is about 26171.2865178615. The cubic root of 684936238 is about 881.4886296544.

The spelling of 684936238 in words is "six hundred eighty-four million, nine hundred thirty-six thousand, two hundred thirty-eight".