3640275 has 24 divisors (see below), whose sum is σ = 6688560. Its totient is φ = 1941120.

The previous prime is 3640249. The next prime is 3640289. The reversal of 3640275 is 5720463.

It is a happy number.

It is not a de Polignac number, because 3640275 - 2⁵ = 3640243 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2022 + ... + 3371.

It is an arithmetic number, because the mean of its divisors is an integer number (278690).

Almost surely, 2^3640275 is an apocalyptic number.

3640275 is a deficient number, since it is larger than the sum of its proper divisors (3048285).

3640275 is a wasteful number, since it uses less digits than its factorization.

3640275 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5412 (or 5401 counting only the distinct ones).

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

The square root of 3640275 is about 1907.9504710553. The cubic root of 3640275 is about 153.8313073814.

The spelling of 3640275 in words is "three million, six hundred forty thousand, two hundred seventy-five".