705214656 has 84 divisors (see below), whose sum is σ = 2054610064. Its totient is φ = 231206400.

The previous prime is 705214651. The next prime is 705214667. The reversal of 705214656 is 656412507.

It is a happy number.

705214656 is a `hidden beast` number, since 70 + 521 + 4 + 65 + 6 = 666.

It is a super-2 number, since 2×705214656² = 994655422074396672, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a self number, because there is not a number n which added to its sum of digits gives 705214656.

It is not an unprimeable number, because it can be changed into a prime (705214651) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 25101 + ... + 45171.

Almost surely, 2^705214656 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 705214656, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1027305032).

705214656 is an abundant number, since it is smaller than the sum of its proper divisors (1349395408).

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

705214656 is a wasteful number, since it uses less digits than its factorization.

705214656 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20150 (or 20137 counting only the distinct ones).

The product of its (nonzero) digits is 50400, while the sum is 36.

The square root of 705214656 is about 26555.8779933935. The cubic root of 705214656 is about 890.1033655142.

The spelling of 705214656 in words is "seven hundred five million, two hundred fourteen thousand, six hundred fifty-six".