20610828 has 96 divisors (see below), whose sum is σ = 61824000. Its totient is φ = 5816448.

The previous prime is 20610827. The next prime is 20610833. The reversal of 20610828 is 82801602.

20610828 is a `hidden beast` number, since 20 + 610 + 8 + 28 = 666.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (20610827) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 103473 + ... + 103671.

It is an arithmetic number, because the mean of its divisors is an integer number (644000).

Almost surely, 2^20610828 is an apocalyptic number.

20610828 is a gapful number since it is divisible by the number (28) 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 20610828, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30912000).

20610828 is an abundant number, since it is smaller than the sum of its proper divisors (41213172).

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

20610828 is a wasteful number, since it uses less digits than its factorization.

20610828 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 356 (or 348 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 27.

The square root of 20610828 is about 4539.9149771774. The cubic root of 20610828 is about 274.1775005599.

The spelling of 20610828 in words is "twenty million, six hundred ten thousand, eight hundred twenty-eight".