3620645 has 32 divisors (see below), whose sum is σ = 5308416. Its totient is φ = 2318400.

The previous prime is 3620641. The next prime is 3620657. The reversal of 3620645 is 5460263.

It is not a de Polignac number, because 3620645 - 2² = 3620641 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3620641) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 50960 + ... + 51030.

It is an arithmetic number, because the mean of its divisors is an integer number (165888).

Almost surely, 2^3620645 is an apocalyptic number.

3620645 is a gapful number since it is divisible by the number (35) formed by its first and last digit.

It is an amenable number.

3620645 is a deficient number, since it is larger than the sum of its proper divisors (1687771).

3620645 is a wasteful number, since it uses less digits than its factorization.

3620645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 161.

The product of its (nonzero) digits is 4320, while the sum is 26.

The square root of 3620645 is about 1902.7992537312. The cubic root of 3620645 is about 153.5542996683.

The spelling of 3620645 in words is "three million, six hundred twenty thousand, six hundred forty-five".