3644378 has 4 divisors (see below), whose sum is σ = 5466570. Its totient is φ = 1822188.

The previous prime is 3644357. The next prime is 3644411. The reversal of 3644378 is 8734463.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 8734463 = 1847 ⋅4729.

It can be written as a sum of positive squares in only one way, i.e., 2505889 + 1138489 = 1583^2 + 1067^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 911093 + ... + 911096.

Almost surely, 2^3644378 is an apocalyptic number.

3644378 is a deficient number, since it is larger than the sum of its proper divisors (1822192).

3644378 is a wasteful number, since it uses less digits than its factorization.

3644378 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1822191.

The product of its digits is 48384, while the sum is 35.

The square root of 3644378 is about 1909.0254058027. The cubic root of 3644378 is about 153.8890807520.

The spelling of 3644378 in words is "three million, six hundred forty-four thousand, three hundred seventy-eight".