690288560 has 80 divisors (see below), whose sum is σ = 1733889024. Its totient is φ = 254063616.

The previous prime is 690288551. The next prime is 690288623. The reversal of 690288560 is 65882096.

It is a happy number.

690288560 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (80).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 397454 + ... + 399186.

Almost surely, 2^690288560 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 690288560, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (866944512).

690288560 is an abundant number, since it is smaller than the sum of its proper divisors (1043600464).

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

690288560 is a wasteful number, since it uses less digits than its factorization.

690288560 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2142 (or 2136 counting only the distinct ones).

The product of its (nonzero) digits is 207360, while the sum is 44.

The square root of 690288560 is about 26273.3431447161. The cubic root of 690288560 is about 883.7787575159.

The spelling of 690288560 in words is "six hundred ninety million, two hundred eighty-eight thousand, five hundred sixty".