705390 has 32 divisors (see below), whose sum is σ = 1935360. Its totient is φ = 161184.

The previous prime is 705389. The next prime is 705403. The reversal of 705390 is 93507.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 705390.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1470 + ... + 1889.

It is an arithmetic number, because the mean of its divisors is an integer number (60480).

2⁷⁰⁵³⁹⁰ is an apocalyptic number.

705390 is a gapful number since it is divisible by the number (70) formed by its first and last digit.

705390 is an abundant number, since it is smaller than the sum of its proper divisors (1229970).

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

705390 is a wasteful number, since it uses less digits than its factorization.

705390 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3376.

The product of its (nonzero) digits is 945, while the sum is 24.

The square root of 705390 is about 839.8749906980. The cubic root of 705390 is about 89.0177130927.

Adding to 705390 its reverse (93507), we get a palindrome (798897).

It can be divided in two parts, 70 and 5390, that added together give a triangular number (5460 = T₁₀₄).

The spelling of 705390 in words is "seven hundred five thousand, three hundred ninety".