684138430 has 16 divisors (see below), whose sum is σ = 1231886304. Its totient is φ = 273558240.

The previous prime is 684138421. The next prime is 684138443. The reversal of 684138430 is 34831486.

It is a self number, because there is not a number n which added to its sum of digits gives 684138430.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 22015 + ... + 43045.

It is an arithmetic number, because the mean of its divisors is an integer number (76992894).

Almost surely, 2^684138430 is an apocalyptic number.

684138430 is a deficient number, since it is larger than the sum of its proper divisors (547747874).

684138430 is a wasteful number, since it uses less digits than its factorization.

684138430 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24291.

The product of its (nonzero) digits is 55296, while the sum is 37.

The square root of 684138430 is about 26156.0400290258. The cubic root of 684138430 is about 881.1462464911.

The spelling of 684138430 in words is "six hundred eighty-four million, one hundred thirty-eight thousand, four hundred thirty".