3640744 has 8 divisors (see below), whose sum is σ = 6826410. Its totient is φ = 1820368.

The previous prime is 3640717. The next prime is 3640753. The reversal of 3640744 is 4470463.

It can be written as a sum of positive squares in only one way, i.e., 3572100 + 68644 = 1890^2 + 262^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a hoax number, since the sum of its digits (28) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 227539 + ... + 227554.

Almost surely, 2^3640744 is an apocalyptic number.

It is an amenable number.

3640744 is a deficient number, since it is larger than the sum of its proper divisors (3185666).

3640744 is a wasteful number, since it uses less digits than its factorization.

3640744 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 455099 (or 455095 counting only the distinct ones).

The product of its (nonzero) digits is 8064, while the sum is 28.

The square root of 3640744 is about 1908.0733738512. The cubic root of 3640744 is about 153.8379134561.

The spelling of 3640744 in words is "three million, six hundred forty thousand, seven hundred forty-four".