20078208 has 96 divisors (see below), whose sum is σ = 59868900. Its totient is φ = 6451200.

The previous prime is 20078189. The next prime is 20078213. The reversal of 20078208 is 80287002.

It can be written as a sum of positive squares in 2 ways, for example, as 19289664 + 788544 = 4392^2 + 888^2 .

It is a tau number, because it is divible by the number of its divisors (96).

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 33108 + ... + 33708.

Almost surely, 2^20078208 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20078208, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (29934450).

20078208 is an abundant number, since it is smaller than the sum of its proper divisors (39790692).

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

20078208 is a wasteful number, since it uses less digits than its factorization.

20078208 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 650 (or 635 counting only the distinct ones).

The product of its (nonzero) digits is 1792, while the sum is 27.

The square root of 20078208 is about 4480.8713438348. The cubic root of 20078208 is about 271.7951167606.

The spelling of 20078208 in words is "twenty million, seventy-eight thousand, two hundred eight".