It is a congruent number.
Almost surely, 215206620 is an apocalyptic number.
15206620 is a gapful number since it is divisible by the number (10) formed by its first and last digit.
It is an amenable number.
It is a practical number, because each smaller number is the sum of distinct divisors of 15206620, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (18907560).
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
15206620 is a wasteful number, since it uses less digits than its factorization.
15206620 is an evil number, because the sum of its binary digits is even.
The square root of 15206620 is about 3899.5666425899. The cubic root of 15206620 is about 247.7484224724.
Adding to 15206620 its reverse (2660251), we get a palindrome (17866871).
The spelling of 15206620 in words is "fifteen million, two hundred six thousand, six hundred twenty".