69890 has 16 divisors (see below), whose sum is σ = 130680. Its totient is φ = 26880.
The previous prime is 69877. The next prime is 69899. The reversal of 69890 is 9896.
It is a happy number.
It can be written as a sum of positive squares in 4 ways, for example, as 63001 + 6889 = 251^2 + 83^2 .
It is a super-2 number, since 2×698902 = 9769224200, which contains 22 as substring.
It is an alternating number because its digits alternate between even and odd.
It is a congruent number.
It is not an unprimeable number, because it can be changed into a prime (69899) by changing a digit.
It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 170 + ... + 410.
269890 is an apocalyptic number.
69890 is a deficient number, since it is larger than the sum of its proper divisors (60790).
69890 is a wasteful number, since it uses less digits than its factorization.
69890 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 277.
The product of its (nonzero) digits is 3888, while the sum is 32.
The square root of 69890 is about 264.3671689148. The cubic root of 69890 is about 41.1912539955.
It can be divided in two parts, 69 and 890, that added together give a palindrome (959).
The spelling of 69890 in words is "sixty-nine thousand, eight hundred ninety".
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