1712640 has 80 divisors (see below), whose sum is σ = 5499648. Its totient is φ = 454656.

The previous prime is 1712639. The next prime is 1712707. The reversal of 1712640 is 462171.

It is a tau number, because it is divible by the number of its divisors (80).

It is a super-3 number, since 3×1712640³ = 15070216933343232000, which contains 333 as substring.

It is an Ulam number.

It is a nialpdrome in base 8.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (5) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7569 + ... + 7791.

2^1712640 is an apocalyptic number.

1712640 is a gapful number since it is divisible by the number (10) 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 1712640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2749824).

1712640 is an abundant number, since it is smaller than the sum of its proper divisors (3787008).

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

1712640 is an equidigital number, since it uses as much as digits as its factorization.

1712640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 249 (or 233 counting only the distinct ones).

The product of its (nonzero) digits is 336, while the sum is 21.

The square root of 1712640 is about 1308.6787229874. The cubic root of 1712640 is about 119.6433857130.

The spelling of 1712640 in words is "one million, seven hundred twelve thousand, six hundred forty".