697440 has 48 divisors (see below), whose sum is σ = 2198448. Its totient is φ = 185856.

The previous prime is 697423. The next prime is 697441. The reversal of 697440 is 44796.

It is a tau number, because it is divible by the number of its divisors (48).

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a junction number, because it is equal to n+sod(n) for n = 697398 and 697407.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 697440.

It is not an unprimeable number, because it can be changed into a prime (697441) by changing a digit.

697440 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 247 + ... + 1206.

It is an arithmetic number, because the mean of its divisors is an integer number (45801).

2⁶⁹⁷⁴⁴⁰ is an apocalyptic number.

697440 is a gapful number since it is divisible by the number (60) 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 697440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1099224).

697440 is an abundant number, since it is smaller than the sum of its proper divisors (1501008).

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

697440 is a wasteful number, since it uses less digits than its factorization.

697440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1471 (or 1463 counting only the distinct ones).

The product of its (nonzero) digits is 6048, while the sum is 30.

The square root of 697440 is about 835.1287325916. The cubic root of 697440 is about 88.6820282302.

The spelling of 697440 in words is "six hundred ninety-seven thousand, four hundred forty".