684100140 has 48 divisors (see below), whose sum is σ = 1981536480. Its totient is φ = 176135680.

The previous prime is 684100127. The next prime is 684100223. The reversal of 684100140 is 41001486.

684100140 = T₂₉₉₉ + T₃₀₀₀ + ... + T₃₁₄₃.

It is a self number, because there is not a number n which added to its sum of digits gives 684100140.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 194841 + ... + 198320.

It is an arithmetic number, because the mean of its divisors is an integer number (41282010).

Almost surely, 2^684100140 is an apocalyptic number.

684100140 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

684100140 is an abundant number, since it is smaller than the sum of its proper divisors (1297436340).

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

684100140 is a wasteful number, since it uses less digits than its factorization.

684100140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 393202 (or 393200 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 24.

The square root of 684100140 is about 26155.3080654769. The cubic root of 684100140 is about 881.1298074598.

The spelling of 684100140 in words is "six hundred eighty-four million, one hundred thousand, one hundred forty".