3620866 has 4 divisors (see below), whose sum is σ = 5431302. Its totient is φ = 1810432.

The previous prime is 3620843. The next prime is 3620879. The reversal of 3620866 is 6680263.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 6680263 = 439 ⋅15217.

It can be written as a sum of positive squares in only one way, i.e., 3345241 + 275625 = 1829^2 + 525^2 .

It is a super-2 number, since 2×3620866² = 26221341179912, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 905215 + ... + 905218.

Almost surely, 2^3620866 is an apocalyptic number.

3620866 is a deficient number, since it is larger than the sum of its proper divisors (1810436).

3620866 is a wasteful number, since it uses less digits than its factorization.

3620866 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1810435.

The product of its (nonzero) digits is 10368, while the sum is 31.

The square root of 3620866 is about 1902.8573251823. The cubic root of 3620866 is about 153.5574238639.

It can be divided in two parts, 36 and 20866, that added together give a palindrome (20902).

The spelling of 3620866 in words is "three million, six hundred twenty thousand, eight hundred sixty-six".