690471522 has 96 divisors (see below), whose sum is σ = 1656240768. Its totient is φ = 206592768.

The previous prime is 690471461. The next prime is 690471581. The reversal of 690471522 is 225174096.

690471522 is a `hidden beast` number, since 6 + 90 + 47 + 1 + 522 = 666.

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, 1417563 + ... + 1418049.

It is an arithmetic number, because the mean of its divisors is an integer number (17252508).

Almost surely, 2^690471522 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 690471522, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (828120384).

690471522 is an abundant number, since it is smaller than the sum of its proper divisors (965769246).

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

690471522 is a wasteful number, since it uses less digits than its factorization.

690471522 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 664 (or 661 counting only the distinct ones).

The product of its (nonzero) digits is 30240, while the sum is 36.

The square root of 690471522 is about 26276.8248081841. The cubic root of 690471522 is about 883.8568329057.

The spelling of 690471522 in words is "six hundred ninety million, four hundred seventy-one thousand, five hundred twenty-two".