3651020 has 24 divisors (see below), whose sum is σ = 8001504. Its totient is φ = 1396736.

The previous prime is 3651019. The next prime is 3651023. The reversal of 3651020 is 201563.

3651020 = T₁₀₀ + T₁₀₁ + ... + T₂₈₃.

It is a self number, because there is not a number n which added to its sum of digits gives 3651020.

It is not an unprimeable number, because it can be changed into a prime (3651023) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3509 + ... + 4428.

It is an arithmetic number, because the mean of its divisors is an integer number (333396).

Almost surely, 2^3651020 is an apocalyptic number.

It is an amenable number.

3651020 is an abundant number, since it is smaller than the sum of its proper divisors (4350484).

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

3651020 is a wasteful number, since it uses less digits than its factorization.

3651020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7969 (or 7967 counting only the distinct ones).

The product of its (nonzero) digits is 180, while the sum is 17.

The square root of 3651020 is about 1910.7642450077. The cubic root of 3651020 is about 153.9825133346.

Adding to 3651020 its reverse (201563), we get a palindrome (3852583).

The spelling of 3651020 in words is "three million, six hundred fifty-one thousand, twenty".