3649678 has 4 divisors (see below), whose sum is σ = 5474520. Its totient is φ = 1824838.

The previous prime is 3649669. The next prime is 3649687. The reversal of 3649678 is 8769463.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (3649669) and next prime (3649687).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 912418 + ... + 912421.

It is an arithmetic number, because the mean of its divisors is an integer number (1368630).

Almost surely, 2^3649678 is an apocalyptic number.

3649678 is a deficient number, since it is larger than the sum of its proper divisors (1824842).

3649678 is a wasteful number, since it uses less digits than its factorization.

3649678 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1824841.

The product of its digits is 217728, while the sum is 43.

The square root of 3649678 is about 1910.4130443441. The cubic root of 3649678 is about 153.9636446480.

It can be divided in two parts, 364967 and 8, that multiplied together give a triangular number (2919736 = T₂₄₁₆).

The spelling of 3649678 in words is "three million, six hundred forty-nine thousand, six hundred seventy-eight".