1684850440 has 64 divisors (see below), whose sum is σ = 4665749760. Its totient is φ = 533226240.

The previous prime is 1684850417. The next prime is 1684850471. The reversal of 1684850440 is 440584861.

It is a Harshad number since it is a multiple of its sum of digits (40).

It is a junction number, because it is equal to n+sod(n) for n = 1684850393 and 1684850402.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 227796 + ... + 235075.

It is an arithmetic number, because the mean of its divisors is an integer number (72902340).

Almost surely, 2^1684850440 is an apocalyptic number.

1684850440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1684850440 is an abundant number, since it is smaller than the sum of its proper divisors (2980899320).

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

1684850440 is a wasteful number, since it uses less digits than its factorization.

1684850440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 462902 (or 462898 counting only the distinct ones).

The product of its (nonzero) digits is 122880, while the sum is 40.

The square root of 1684850440 is about 41046.9297268383. The cubic root of 1684850440 is about 1189.9273641610.

The spelling of 1684850440 in words is "one billion, six hundred eighty-four million, eight hundred fifty thousand, four hundred forty".