3947478 has 32 divisors (see below), whose sum is σ = 8586240. Its totient is φ = 1205280.

The previous prime is 3947473. The next prime is 3947479. The reversal of 3947478 is 8747493.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3947473) 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, 2976 + ... + 4092.

It is an arithmetic number, because the mean of its divisors is an integer number (268320).

Almost surely, 2^3947478 is an apocalyptic number.

3947478 is a gapful number since it is divisible by the number (38) formed by its first and last digit.

3947478 is an abundant number, since it is smaller than the sum of its proper divisors (4638762).

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

3947478 is a wasteful number, since it uses less digits than its factorization.

3947478 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1172.

The product of its digits is 169344, while the sum is 42.

The square root of 3947478 is about 1986.8261121699. The cubic root of 3947478 is about 158.0422629024.

The spelling of 3947478 in words is "three million, nine hundred forty-seven thousand, four hundred seventy-eight".