3578220 has 72 divisors (see below), whose sum is σ = 11016096. Its totient is φ = 940032.

The previous prime is 3578209. The next prime is 3578221. The reversal of 3578220 is 228753.

3578220 = 133² + 134² + ... + 235².

It is a hoax number, since the sum of its digits (27) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (3578221) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 18444 + ... + 18636.

Almost surely, 2^3578220 is an apocalyptic number.

3578220 is a gapful number since it is divisible by the number (30) 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 3578220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (5508048).

3578220 is an abundant number, since it is smaller than the sum of its proper divisors (7437876).

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

3578220 is a wasteful number, since it uses less digits than its factorization.

3578220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 311 (or 306 counting only the distinct ones).

The product of its (nonzero) digits is 3360, while the sum is 27.

The square root of 3578220 is about 1891.6183547428. The cubic root of 3578220 is about 152.9521829299.

The spelling of 3578220 in words is "three million, five hundred seventy-eight thousand, two hundred twenty".