69690 has 32 divisors (see below), whose sum is σ = 176256. Its totient is φ = 17600.

The previous prime is 69677. The next prime is 69691. The reversal of 69690 is 9696.

It is a super-2 number, since 2×69690² = 9713392200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is an alternating number because its digits alternate between even and odd.

It is a zygodrome in base 9.

It is not an unprimeable number, because it can be changed into a prime (69691) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 640 + ... + 740.

It is an arithmetic number, because the mean of its divisors is an integer number (5508).

2⁶⁹⁶⁹⁰ is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 69690, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (88128).

69690 is an abundant number, since it is smaller than the sum of its proper divisors (106566).

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

69690 is a wasteful number, since it uses less digits than its factorization.

69690 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 134.

The product of its (nonzero) digits is 2916, while the sum is 30.

The square root of 69690 is about 263.9886361191. The cubic root of 69690 is about 41.1519249469.

The spelling of 69690 in words is "sixty-nine thousand, six hundred ninety".