3639678 has 32 divisors (see below), whose sum is σ = 8759040. Its totient is φ = 984960.

The previous prime is 3639667. The next prime is 3639689. The reversal of 3639678 is 8769363.

It is an interprime number because it is at equal distance from previous prime (3639667) and next prime (3639689).

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1483 + ... + 3078.

It is an arithmetic number, because the mean of its divisors is an integer number (273720).

Almost surely, 2^3639678 is an apocalyptic number.

3639678 is a gapful number since it is divisible by the number (38) formed by its first and last digit.

3639678 is an abundant number, since it is smaller than the sum of its proper divisors (5119362).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

3639678 is a wasteful number, since it uses less digits than its factorization.

3639678 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4592.

The product of its digits is 163296, while the sum is 42.

The square root of 3639678 is about 1907.7940140382. The cubic root of 3639678 is about 153.8228975487.

The spelling of 3639678 in words is "three million, six hundred thirty-nine thousand, six hundred seventy-eight".