705128456 has 16 divisors (see below), whose sum is σ = 1391701200. Its totient is φ = 334008144.

The previous prime is 705128419. The next prime is 705128519. The reversal of 705128456 is 654821507.

It is a super-2 number, since 2×705128456² = 994412278921887872, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (38).

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2319350 + ... + 2319653.

It is an arithmetic number, because the mean of its divisors is an integer number (86981325).

Almost surely, 2^705128456 is an apocalyptic number.

705128456 is a gapful number since it is divisible by the number (76) formed by its first and last digit.

It is an amenable number.

705128456 is a deficient number, since it is larger than the sum of its proper divisors (686572744).

705128456 is a wasteful number, since it uses less digits than its factorization.

705128456 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4639028 (or 4639024 counting only the distinct ones).

The product of its (nonzero) digits is 67200, while the sum is 38.

The square root of 705128456 is about 26554.2549509490. The cubic root of 705128456 is about 890.0670975799.

The spelling of 705128456 in words is "seven hundred five million, one hundred twenty-eight thousand, four hundred fifty-six".