3948978 has 16 divisors (see below), whose sum is σ = 8616096. Its totient is φ = 1196640.

The previous prime is 3948953. The next prime is 3949003. The reversal of 3948978 is 8798493.

It is an interprime number because it is at equal distance from previous prime (3948953) and next prime (3949003).

It is a super-3 number, since 3×3948978³ (a number of 21 digits) contains 333 as substring.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 29851 + ... + 29982.

It is an arithmetic number, because the mean of its divisors is an integer number (538506).

Almost surely, 2^3948978 is an apocalyptic number.

3948978 is an abundant number, since it is smaller than the sum of its proper divisors (4667118).

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

3948978 is a wasteful number, since it uses less digits than its factorization.

3948978 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 59849.

The product of its digits is 435456, while the sum is 48.

The square root of 3948978 is about 1987.2035627987. The cubic root of 3948978 is about 158.0622784983.

The spelling of 3948978 in words is "three million, nine hundred forty-eight thousand, nine hundred seventy-eight".