705394840 has 32 divisors (see below), whose sum is σ = 1641870000. Its totient is φ = 272427904.

The previous prime is 705394819. The next prime is 705394841. The reversal of 705394840 is 48493507.

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

It is a junction number, because it is equal to n+sod(n) for n = 705394793 and 705394802.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (705394841) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 302890 + ... + 305209.

Almost surely, 2^705394840 is an apocalyptic number.

It is an amenable number.

705394840 is an abundant number, since it is smaller than the sum of its proper divisors (936475160).

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

705394840 is a wasteful number, since it uses less digits than its factorization.

705394840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 608139 (or 608135 counting only the distinct ones).

The product of its (nonzero) digits is 120960, while the sum is 40.

The square root of 705394840 is about 26559.2703213021. The cubic root of 705394840 is about 890.1791668919.

The spelling of 705394840 in words is "seven hundred five million, three hundred ninety-four thousand, eight hundred forty".