690144728 has 64 divisors (see below), whose sum is σ = 1618854720. Its totient is φ = 268531200.

The previous prime is 690144713. The next prime is 690144773. The reversal of 690144728 is 827441096.

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 15 ways as a sum of consecutive naturals, for example, 36638 + ... + 52178.

It is an arithmetic number, because the mean of its divisors is an integer number (25294605).

Almost surely, 2^690144728 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 690144728, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (809427360).

690144728 is an abundant number, since it is smaller than the sum of its proper divisors (928709992).

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

690144728 is a wasteful number, since it uses less digits than its factorization.

690144728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15628 (or 15624 counting only the distinct ones).

The product of its (nonzero) digits is 96768, while the sum is 41.

The square root of 690144728 is about 26270.6057790832. The cubic root of 690144728 is about 883.7173703882.

The spelling of 690144728 in words is "six hundred ninety million, one hundred forty-four thousand, seven hundred twenty-eight".