690388160 has 112 divisors (see below), whose sum is σ = 2049719040. Its totient is φ = 215178240.

The previous prime is 690388147. The next prime is 690388163. The reversal of 690388160 is 61883096.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (112).

It is a super-2 number, since 2×690388160² = 953271622936371200, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (690388163) 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 15 ways as a sum of consecutive naturals, for example, 10631 + ... + 38649.

Almost surely, 2^690388160 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 690388160, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1024859520).

690388160 is an abundant number, since it is smaller than the sum of its proper divisors (1359330880).

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

690388160 is a wasteful number, since it uses less digits than its factorization.

690388160 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28054 (or 28044 counting only the distinct ones).

The product of its (nonzero) digits is 62208, while the sum is 41.

The square root of 690388160 is about 26275.2385336461. The cubic root of 690388160 is about 883.8212615430.

The spelling of 690388160 in words is "six hundred ninety million, three hundred eighty-eight thousand, one hundred sixty".