690064 has 40 divisors (see below), whose sum is σ = 1473120. Its totient is φ = 311808.

The previous prime is 690059. The next prime is 690073. The reversal of 690064 is 460096.

690064 = T₃₂ + T₃₃ + ... + T₁₆₀.

It is an Ulam number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11667 + ... + 11725.

It is an arithmetic number, because the mean of its divisors is an integer number (36828).

2⁶⁹⁰⁰⁶⁴ 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 690064, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (736560).

690064 is an abundant number, since it is smaller than the sum of its proper divisors (783056).

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

690064 is a wasteful number, since it uses less digits than its factorization.

690064 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 127 (or 121 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 25.

The square root of 690064 is about 830.7009088715. The cubic root of 690064 is about 88.3682912148.

The spelling of 690064 in words is "six hundred ninety thousand, sixty-four".