705982644 has 36 divisors (see below), whose sum is σ = 1832802244. Its totient is φ = 228966912.

The previous prime is 705982619. The next prime is 705982661. The reversal of 705982644 is 446289507.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 303177744 + 402804900 = 17412^2 + 20070^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is a super-2 number, since 2×705982644² = 996822987258461472, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 705982644.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 263677 + ... + 266340.

Almost surely, 2^705982644 is an apocalyptic number.

705982644 is a gapful number since it is divisible by the number (74) formed by its first and last digit.

It is an amenable number.

705982644 is an abundant number, since it is smaller than the sum of its proper divisors (1126819600).

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

705982644 is a wasteful number, since it uses less digits than its factorization.

705982644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 530064 (or 530059 counting only the distinct ones).

The product of its (nonzero) digits is 483840, while the sum is 45.

The square root of 705982644 is about 26570.3339083272. Note that the first 3 decimals coincide. The cubic root of 705982644 is about 890.4263597033.

The spelling of 705982644 in words is "seven hundred five million, nine hundred eighty-two thousand, six hundred forty-four".