690728735 has 16 divisors (see below), whose sum is σ = 835154496. Its totient is φ = 548414208.

The previous prime is 690728723. The next prime is 690728777. The reversal of 690728735 is 537827096.

It is a cyclic number.

It is not a de Polignac number, because 690728735 - 2⁴ = 690728719 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 690728735.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 416027 + ... + 417683.

It is an arithmetic number, because the mean of its divisors is an integer number (52197156).

Almost surely, 2^690728735 is an apocalyptic number.

690728735 is a deficient number, since it is larger than the sum of its proper divisors (144425761).

690728735 is a wasteful number, since it uses less digits than its factorization.

690728735 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2242.

The product of its (nonzero) digits is 635040, while the sum is 47.

The square root of 690728735 is about 26281.7186462377. The cubic root of 690728735 is about 883.9665701103.

The spelling of 690728735 in words is "six hundred ninety million, seven hundred twenty-eight thousand, seven hundred thirty-five".