1720632 has 16 divisors (see below), whose sum is σ = 4301640. Its totient is φ = 573536.

The previous prime is 1720619. The next prime is 1720633. The reversal of 1720632 is 2360271.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 1720599 and 1720608.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1720633) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 35823 + ... + 35870.

2^1720632 is an apocalyptic number.

1720632 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1720632 is an abundant number, since it is smaller than the sum of its proper divisors (2581008).

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

1720632 is a wasteful number, since it uses less digits than its factorization.

1720632 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 71702 (or 71698 counting only the distinct ones).

The product of its (nonzero) digits is 504, while the sum is 21.

The square root of 1720632 is about 1311.7286304720. The cubic root of 1720632 is about 119.8292014586.

The spelling of 1720632 in words is "one million, seven hundred twenty thousand, six hundred thirty-two".