3620745 has 24 divisors (see below), whose sum is σ = 6646536. Its totient is φ = 1817088.

The previous prime is 3620741. The next prime is 3620753. The reversal of 3620745 is 5470263.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 304704 + 3316041 = 552^2 + 1821^2 .

It is not a de Polignac number, because 3620745 - 2² = 3620741 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (3620741) 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, 1602 + ... + 3131.

It is an arithmetic number, because the mean of its divisors is an integer number (276939).

Almost surely, 2^3620745 is an apocalyptic number.

It is an amenable number.

3620745 is a deficient number, since it is larger than the sum of its proper divisors (3025791).

3620745 is a wasteful number, since it uses less digits than its factorization.

3620745 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4761 (or 4758 counting only the distinct ones).

The product of its (nonzero) digits is 5040, while the sum is 27.

The square root of 3620745 is about 1902.8255306254. The cubic root of 3620745 is about 153.5557133472. Note that the first 3 decimals are identical.

The spelling of 3620745 in words is "three million, six hundred twenty thousand, seven hundred forty-five".