3937478 has 4 divisors (see below), whose sum is σ = 5906220. Its totient is φ = 1968738.

The previous prime is 3937477. The next prime is 3937481. The reversal of 3937478 is 8747393.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 8747393 = 2731 ⋅3203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3937477) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 984368 + ... + 984371.

It is an arithmetic number, because the mean of its divisors is an integer number (1476555).

Almost surely, 2^3937478 is an apocalyptic number.

3937478 is a deficient number, since it is larger than the sum of its proper divisors (1968742).

3937478 is a wasteful number, since it uses less digits than its factorization.

3937478 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1968741.

The product of its digits is 127008, while the sum is 41.

The square root of 3937478 is about 1984.3079398118. The cubic root of 3937478 is about 157.9086958458.

The spelling of 3937478 in words is "three million, nine hundred thirty-seven thousand, four hundred seventy-eight".