3978036 has 18 divisors (see below), whose sum is σ = 10055682. Its totient is φ = 1326000.

The previous prime is 3978031. The next prime is 3978043. The reversal of 3978036 is 6308793.

It can be written as a sum of positive squares in only one way, i.e., 3825936 + 152100 = 1956^2 + 390^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is a Harshad number since it is a multiple of its sum of digits (36), and also a Moran number because the ratio is a prime number: 110501 = 3978036 / (3 + 9 + 7 + 8 + 0 + 3 + 6).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3978031) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 55215 + ... + 55286.

It is an arithmetic number, because the mean of its divisors is an integer number (558649).

Almost surely, 2^3978036 is an apocalyptic number.

3978036 is a gapful number since it is divisible by the number (36) formed by its first and last digit.

It is an amenable number.

3978036 is an abundant number, since it is smaller than the sum of its proper divisors (6077646).

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

3978036 is a wasteful number, since it uses less digits than its factorization.

3978036 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 110511 (or 110506 counting only the distinct ones).

The product of its (nonzero) digits is 27216, while the sum is 36.

The square root of 3978036 is about 1994.5014414635. The cubic root of 3978036 is about 158.4490244643.

The spelling of 3978036 in words is "three million, nine hundred seventy-eight thousand, thirty-six".