3728220 has 24 divisors (see below), whose sum is σ = 10439184. Its totient is φ = 994176.

The previous prime is 3728203. The next prime is 3728243. The reversal of 3728220 is 228273.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 31009 + ... + 31128.

It is an arithmetic number, because the mean of its divisors is an integer number (434966).

Almost surely, 2^3728220 is an apocalyptic number.

3728220 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

3728220 is an abundant number, since it is smaller than the sum of its proper divisors (6710964).

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

3728220 is a wasteful number, since it uses less digits than its factorization.

3728220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 62149 (or 62147 counting only the distinct ones).

The product of its (nonzero) digits is 1344, while the sum is 24.

The square root of 3728220 is about 1930.8599120599. The cubic root of 3728220 is about 155.0602609946.

The spelling of 3728220 in words is "three million, seven hundred twenty-eight thousand, two hundred twenty".