3686484978 has 54 divisors (see below), whose sum is σ = 8786274861. Its totient is φ = 1116258000.

The previous prime is 3686484953. The next prime is 3686484979. The reversal of 3686484978 is 8794846863.

3686484978 is a `hidden beast` number, since 3 + 6 + 86 + 484 + 9 + 78 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 1987643889 + 1698841089 = 44583^2 + 41217^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=42933.

It is not an unprimeable number, because it can be changed into a prime (3686484979) by changing a digit.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 2832928 + ... + 2834228.

Almost surely, 2^3686484978 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 3686484978

3686484978 is an abundant number, since it is smaller than the sum of its proper divisors (5099789883).

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

3686484978 is a wasteful number, since it uses less digits than its factorization.

3686484978 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2632 (or 1317 counting only the distinct ones).

The product of its digits is 55738368, while the sum is 63.

The square root of 3686484978 is about 60716.4308733641. The cubic root of 3686484978 is about 1544.7948852658.

The spelling of 3686484978 in words is "three billion, six hundred eighty-six million, four hundred eighty-four thousand, nine hundred seventy-eight".