1720464 has 40 divisors (see below), whose sum is σ = 4514592. Its totient is φ = 564480.

The previous prime is 1720457. The next prime is 1720471. The reversal of 1720464 is 4640271.

It is an interprime number because it is at equal distance from previous prime (1720457) and next prime (1720471).

It is a Harshad number since it is a multiple of its sum of digits (24).

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, 3259 + ... + 3749.

2^1720464 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1720464, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2257296).

1720464 is an abundant number, since it is smaller than the sum of its proper divisors (2794128).

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

1720464 is a wasteful number, since it uses less digits than its factorization.

1720464 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 575 (or 569 counting only the distinct ones).

The product of its (nonzero) digits is 1344, while the sum is 24.

The square root of 1720464 is about 1311.6645912732. The cubic root of 1720464 is about 119.8253013488.

The spelling of 1720464 in words is "one million, seven hundred twenty thousand, four hundred sixty-four".