1685403552 has 48 divisors (see below), whose sum is σ = 5056212672. Its totient is φ = 481543680.

The previous prime is 1685403547. The next prime is 1685403557. The reversal of 1685403552 is 2553045861.

It is an interprime number because it is at equal distance from previous prime (1685403547) and next prime (1685403557).

It is a tau number, because it is divible by the number of its divisors (48).

It is a self number, because there is not a number n which added to its sum of digits gives 1685403552.

It is not an unprimeable number, because it can be changed into a prime (1685403557) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1253349 + ... + 1254692.

It is an arithmetic number, because the mean of its divisors is an integer number (105337764).

Almost surely, 2^1685403552 is an apocalyptic number.

1685403552 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1685403552 is an abundant number, since it is smaller than the sum of its proper divisors (3370809120).

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

1685403552 is a wasteful number, since it uses less digits than its factorization.

1685403552 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2508061 (or 2508053 counting only the distinct ones).

The product of its (nonzero) digits is 144000, while the sum is 39.

The square root of 1685403552 is about 41053.6667302691. Note that the first 3 decimals coincide. The cubic root of 1685403552 is about 1190.0575618885.

The spelling of 1685403552 in words is "one billion, six hundred eighty-five million, four hundred three thousand, five hundred fifty-two".