690076728 has 192 divisors, whose sum is σ = 2179457280. Its totient is φ = 195148800.

The previous prime is 690076693. The next prime is 690076747. The reversal of 690076728 is 827670096.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 782848 + ... + 783728.

It is an arithmetic number, because the mean of its divisors is an integer number (11351340).

Almost surely, 2^690076728 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 690076728, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1089728640).

690076728 is an abundant number, since it is smaller than the sum of its proper divisors (1489380552).

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

690076728 is a wasteful number, since it uses less digits than its factorization.

690076728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 970 (or 963 counting only the distinct ones).

The product of its (nonzero) digits is 254016, while the sum is 45.

The square root of 690076728 is about 26269.3115250476. The cubic root of 690076728 is about 883.6883451936.

The spelling of 690076728 in words is "six hundred ninety million, seventy-six thousand, seven hundred twenty-eight".