690728734 has 8 divisors (see below), whose sum is σ = 1097039808. Its totient is φ = 325048800.

The previous prime is 690728723. The next prime is 690728777. The reversal of 690728734 is 437827096.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10157742 + ... + 10157809.

It is an arithmetic number, because the mean of its divisors is an integer number (137129976).

Almost surely, 2^690728734 is an apocalyptic number.

690728734 is a deficient number, since it is larger than the sum of its proper divisors (406311074).

690728734 is a wasteful number, since it uses less digits than its factorization.

690728734 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20315570.

The product of its (nonzero) digits is 508032, while the sum is 46.

The square root of 690728734 is about 26281.7186272131. The cubic root of 690728734 is about 883.9665696837.

The spelling of 690728734 in words is "six hundred ninety million, seven hundred twenty-eight thousand, seven hundred thirty-four".