1685772 has 90 divisors (see below), whose sum is σ = 4956644. Its totient is φ = 498960.

The previous prime is 1685767. The next prime is 1685773. The reversal of 1685772 is 2775861.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is not an unprimeable number, because it can be changed into a prime (1685773) by changing a digit.

It is a polite number, since it can be written in 29 ways as a sum of consecutive naturals, for example, 39183 + ... + 39225.

2^1685772 is an apocalyptic number.

1685772 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1685772, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2478322).

1685772 is an abundant number, since it is smaller than the sum of its proper divisors (3270872).

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

1685772 is a wasteful number, since it uses less digits than its factorization.

1685772 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 81 (or 59 counting only the distinct ones).

The product of its digits is 23520, while the sum is 36.

The square root of 1685772 is about 1298.3728278118. The cubic root of 1685772 is about 119.0144275519.

The spelling of 1685772 in words is "one million, six hundred eighty-five thousand, seven hundred seventy-two".