705388720 has 40 divisors (see below), whose sum is σ = 1684360944. Its totient is φ = 274528512.

The previous prime is 705388669. The next prime is 705388759. The reversal of 705388720 is 27883507.

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

It is a hoax number, since the sum of its digits (40) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (40).

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 7 ways as a sum of consecutive naturals, for example, 116194 + ... + 122113.

Almost surely, 2^705388720 is an apocalyptic number.

It is an amenable number.

705388720 is an abundant number, since it is smaller than the sum of its proper divisors (978972224).

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

705388720 is a wasteful number, since it uses less digits than its factorization.

705388720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 238357 (or 238351 counting only the distinct ones).

The product of its (nonzero) digits is 94080, while the sum is 40.

The square root of 705388720 is about 26559.1551070436. The cubic root of 705388720 is about 890.1765924887.

The spelling of 705388720 in words is "seven hundred five million, three hundred eighty-eight thousand, seven hundred twenty".