3658220 has 24 divisors (see below), whose sum is σ = 7762608. Its totient is φ = 1448000.

The previous prime is 3658211. The next prime is 3658283. The reversal of 3658220 is 228563.

It is a self number, because there is not a number n which added to its sum of digits gives 3658220.

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, 1115 + ... + 2925.

It is an arithmetic number, because the mean of its divisors is an integer number (323442).

Almost surely, 2^3658220 is an apocalyptic number.

It is an amenable number.

3658220 is an abundant number, since it is smaller than the sum of its proper divisors (4104388).

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

3658220 is a wasteful number, since it uses less digits than its factorization.

3658220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1921 (or 1919 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 26.

The square root of 3658220 is about 1912.6473799423. The cubic root of 3658220 is about 154.0836673597.

The spelling of 3658220 in words is "three million, six hundred fifty-eight thousand, two hundred twenty".