1684669860 has 48 divisors (see below), whose sum is σ = 5241196800. Its totient is φ = 449245152.

The previous prime is 1684669849. The next prime is 1684669871. The reversal of 1684669860 is 689664861.

It is an interprime number because it is at equal distance from previous prime (1684669849) and next prime (1684669871).

It is a super-2 number, since 2×1684669860² = 5676225074384839200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a junction number, because it is equal to n+sod(n) for n = 1684669797 and 1684669806.

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, 1559340 + ... + 1560419.

It is an arithmetic number, because the mean of its divisors is an integer number (109191600).

Almost surely, 2^1684669860 is an apocalyptic number.

1684669860 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1684669860 is an abundant number, since it is smaller than the sum of its proper divisors (3556526940).

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

1684669860 is a wasteful number, since it uses less digits than its factorization.

1684669860 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3119777 (or 3119769 counting only the distinct ones).

The product of its (nonzero) digits is 2985984, while the sum is 54.

The square root of 1684669860 is about 41044.7299905847. The cubic root of 1684669860 is about 1189.8848510383.

The spelling of 1684669860 in words is "one billion, six hundred eighty-four million, six hundred sixty-nine thousand, eight hundred sixty".