690407712 has 144 divisors (see below), whose sum is σ = 2143683360. Its totient is φ = 217976832.

The previous prime is 690407701. The next prime is 690407719. The reversal of 690407712 is 217704096.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (144).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is not an unprimeable number, because it can be changed into a prime (690407719) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 145408 + ... + 150080.

It is an arithmetic number, because the mean of its divisors is an integer number (14886690).

Almost surely, 2^690407712 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 690407712, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1071841680).

690407712 is an abundant number, since it is smaller than the sum of its proper divisors (1453275648).

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

690407712 is a wasteful number, since it uses less digits than its factorization.

690407712 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4717 (or 4697 counting only the distinct ones).

The product of its (nonzero) digits is 21168, while the sum is 36.

The square root of 690407712 is about 26275.6105923345. The cubic root of 690407712 is about 883.8296048254.

The spelling of 690407712 in words is "six hundred ninety million, four hundred seven thousand, seven hundred twelve".