690533284 has 27 divisors (see below), whose sum is σ = 1406477793. Its totient is φ = 295785168.

The previous prime is 690533273. The next prime is 690533287. The reversal of 690533284 is 482335096.

The square root of 690533284 is 26278.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 432224100 + 258309184 = 20790^2 + 16072^2 .

It is not an unprimeable number, because it can be changed into a prime (690533287) by changing a digit.

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 8 ways as a sum of consecutive naturals, for example, 366954 + ... + 368830.

Almost surely, 2^690533284 is an apocalyptic number.

690533284 is the 26278-th square number.

It is an amenable number.

690533284 is an abundant number, since it is smaller than the sum of its proper divisors (715944509).

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

690533284 is an equidigital number, since it uses as much as digits as its factorization.

690533284 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3772 (or 1886 counting only the distinct ones).

The product of its (nonzero) digits is 155520, while the sum is 40.

The cubic root of 690533284 is about 883.8831854954.

The spelling of 690533284 in words is "six hundred ninety million, five hundred thirty-three thousand, two hundred eighty-four".