690490530 has 48 divisors (see below), whose sum is σ = 1900884024. Its totient is φ = 173299200.

The previous prime is 690490481. The next prime is 690490561. The reversal of 690490530 is 35094096.

It can be written as a sum of positive squares in 4 ways, for example, as 690480729 + 9801 = 26277^2 + 99^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 224121 + ... + 227180.

Almost surely, 2^690490530 is an apocalyptic number.

690490530 is an abundant number, since it is smaller than the sum of its proper divisors (1210393494).

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

690490530 is a wasteful number, since it uses less digits than its factorization.

690490530 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 451331 (or 451328 counting only the distinct ones).

The product of its (nonzero) digits is 29160, while the sum is 36.

The square root of 690490530 is about 26277.1864932302. The cubic root of 690490530 is about 883.8649434002.

The spelling of 690490530 in words is "six hundred ninety million, four hundred ninety thousand, five hundred thirty".