55690 has 8 divisors (see below), whose sum is σ = 100260. Its totient is φ = 22272.

The previous prime is 55681. The next prime is 55691. The reversal of 55690 is 9655.

It is a happy number.

55690 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 52441 + 3249 = 229^2 + 57^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×55690² = 6202752200, which contains 22 as substring.

It is a plaindrome in base 15.

It is not an unprimeable number, because it can be changed into a prime (55691) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2775 + ... + 2794.

2⁵⁵⁶⁹⁰ is an apocalyptic number.

55690 is a deficient number, since it is larger than the sum of its proper divisors (44570).

55690 is a wasteful number, since it uses less digits than its factorization.

55690 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5576.

The product of its (nonzero) digits is 1350, while the sum is 25.

The square root of 55690 is about 235.9872877932. The cubic root of 55690 is about 38.1878967166.

It can be divided in two parts, 556 and 90, that added together give a palindrome (646).

The spelling of 55690 in words is "fifty-five thousand, six hundred ninety".