20628248 has 32 divisors (see below), whose sum is σ = 40309920. Its totient is φ = 9888000.

The previous prime is 20628247. The next prime is 20628271. The reversal of 20628248 is 84282602.

It is a happy number.

It is a super-3 number, since 3×20628248³ (a number of 23 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20628247) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 19493 + ... + 20523.

It is an arithmetic number, because the mean of its divisors is an integer number (1259685).

Almost surely, 2^20628248 is an apocalyptic number.

It is an amenable number.

20628248 is a deficient number, since it is larger than the sum of its proper divisors (19681672).

20628248 is a wasteful number, since it uses less digits than its factorization.

20628248 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1139 (or 1135 counting only the distinct ones).

The product of its (nonzero) digits is 12288, while the sum is 32.

The square root of 20628248 is about 4541.8331100999. The cubic root of 20628248 is about 274.2547225442.

It can be divided in two parts, 2062 and 8248, that multiplied together give a square (17007376 = 4124²).

The spelling of 20628248 in words is "twenty million, six hundred twenty-eight thousand, two hundred forty-eight".