1730640 has 40 divisors (see below), whose sum is σ = 5365728. Its totient is φ = 461440.

The previous prime is 1730623. The next prime is 1730657. The reversal of 1730640 is 460371.

1730640 is nontrivially palindromic in base 11.

It is an interprime number because it is at equal distance from previous prime (1730623) and next prime (1730657).

It is a tau number, because it is divible by the number of its divisors (40).

It is a super-2 number, since 2×1730640² = 5990229619200, which contains 22 as substring.

It is a hoax number, since the sum of its digits (21) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3366 + ... + 3845.

2^1730640 is an apocalyptic number.

1730640 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1730640 is an abundant number, since it is smaller than the sum of its proper divisors (3635088).

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

1730640 is a wasteful number, since it uses less digits than its factorization.

1730640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7227 (or 7221 counting only the distinct ones).

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

The square root of 1730640 is about 1315.5379127946. The cubic root of 1730640 is about 120.0610800161.

The spelling of 1730640 in words is "one million, seven hundred thirty thousand, six hundred forty".