690486528 has 72 divisors (see below), whose sum is σ = 1846843936. Its totient is φ = 229017600.

The previous prime is 690486527. The next prime is 690486539. The reversal of 690486528 is 825684096.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (690486521) 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, 159918 + ... + 164178.

Almost surely, 2^690486528 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 690486528, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (923421968).

690486528 is an abundant number, since it is smaller than the sum of its proper divisors (1156357408).

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

690486528 is a wasteful number, since it uses less digits than its factorization.

690486528 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4491 (or 4477 counting only the distinct ones).

The product of its (nonzero) digits is 829440, while the sum is 48.

The square root of 690486528 is about 26277.1103434149. The cubic root of 690486528 is about 883.8632358053.

The spelling of 690486528 in words is "six hundred ninety million, four hundred eighty-six thousand, five hundred twenty-eight".