690641250 has 160 divisors (see below), whose sum is σ = 1922984448. Its totient is φ = 164160000.

The previous prime is 690641239. The next prime is 690641267. The reversal of 690641250 is 52146096.

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 79 ways as a sum of consecutive naturals, for example, 1511022 + ... + 1511478.

Almost surely, 2^690641250 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 690641250, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (961492224).

690641250 is an abundant number, since it is smaller than the sum of its proper divisors (1232343198).

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

690641250 is a wasteful number, since it uses less digits than its factorization.

690641250 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 526 (or 511 counting only the distinct ones).

The product of its (nonzero) digits is 12960, while the sum is 33.

The square root of 690641250 is about 26280.0542236884. The cubic root of 690641250 is about 883.9292486184.

The spelling of 690641250 in words is "six hundred ninety million, six hundred forty-one thousand, two hundred fifty".