3640623 has 16 divisors (see below), whose sum is σ = 5654016. Its totient is φ = 2040480.

The previous prime is 3640597. The next prime is 3640633. The reversal of 3640623 is 3260463.

It is not a de Polignac number, because 3640623 - 2⁵ = 3640591 is a prime.

3640623 is a lucky number.

It is a junction number, because it is equal to n+sod(n) for n = 3640593 and 3640602.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3640633) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 523 + ... + 2748.

It is an arithmetic number, because the mean of its divisors is an integer number (353376).

Almost surely, 2^3640623 is an apocalyptic number.

3640623 is a deficient number, since it is larger than the sum of its proper divisors (2013393).

3640623 is a wasteful number, since it uses less digits than its factorization.

3640623 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3334.

The product of its (nonzero) digits is 2592, while the sum is 24.

The square root of 3640623 is about 1908.0416662117. The cubic root of 3640623 is about 153.8362091713.

The spelling of 3640623 in words is "three million, six hundred forty thousand, six hundred twenty-three".