705978730 has 16 divisors (see below), whose sum is σ = 1300315104. Its totient is φ = 275824080.

The previous prime is 705978701. The next prime is 705978731. The reversal of 705978730 is 37879507.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (705978731) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 820476 + ... + 821335.

It is an arithmetic number, because the mean of its divisors is an integer number (81269694).

Almost surely, 2^705978730 is an apocalyptic number.

705978730 is a deficient number, since it is larger than the sum of its proper divisors (594336374).

705978730 is a wasteful number, since it uses less digits than its factorization.

705978730 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1641861.

The product of its (nonzero) digits is 370440, while the sum is 46.

The square root of 705978730 is about 26570.2602546531. The cubic root of 705978730 is about 890.4247141788.

The spelling of 705978730 in words is "seven hundred five million, nine hundred seventy-eight thousand, seven hundred thirty".