3978477 has 10 divisors (see below), whose sum is σ = 5943278. Its totient is φ = 2652264.

The previous prime is 3978473. The next prime is 3978479. The reversal of 3978477 is 7748793.

It can be written as a sum of positive squares in only one way, i.e., 3884841 + 93636 = 1971^2 + 306^2 .

It is not a de Polignac number, because 3978477 - 2² = 3978473 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3978473) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 24478 + ... + 24639.

Almost surely, 2^3978477 is an apocalyptic number.

It is an amenable number.

3978477 is a deficient number, since it is larger than the sum of its proper divisors (1964801).

3978477 is an equidigital number, since it uses as much as digits as its factorization.

3978477 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49129 (or 49120 counting only the distinct ones).

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

The square root of 3978477 is about 1994.6119923434. The cubic root of 3978477 is about 158.4548794002.

It can be divided in two parts, 39 and 78477, that multiplied together give a palindrome (3060603).

The spelling of 3978477 in words is "three million, nine hundred seventy-eight thousand, four hundred seventy-seven".