3977478 has 32 divisors (see below), whose sum is σ = 8968800. Its totient is φ = 1306368.

The previous prime is 3977471. The next prime is 3977483. The reversal of 3977478 is 8747793.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3977471) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3438 + ... + 4446.

It is an arithmetic number, because the mean of its divisors is an integer number (280275).

Almost surely, 2^3977478 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 3977478, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4484400).

3977478 is an abundant number, since it is smaller than the sum of its proper divisors (4991322).

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

3977478 is a wasteful number, since it uses less digits than its factorization.

3977478 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1093 (or 1087 counting only the distinct ones).

The product of its digits is 296352, while the sum is 45.

The square root of 3977478 is about 1994.3615519760. The cubic root of 3977478 is about 158.4416155578.

It can be divided in two parts, 397 and 7478, that added together give a triangular number (7875 = T₁₂₅).

The spelling of 3977478 in words is "three million, nine hundred seventy-seven thousand, four hundred seventy-eight".