3911878 has 4 divisors (see below), whose sum is σ = 5867820. Its totient is φ = 1955938.

The previous prime is 3911861. The next prime is 3911879. The reversal of 3911878 is 8781193.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 8781193 = 23 ⋅381791.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3911879) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 977968 + ... + 977971.

It is an arithmetic number, because the mean of its divisors is an integer number (1466955).

Almost surely, 2^3911878 is an apocalyptic number.

3911878 is a deficient number, since it is larger than the sum of its proper divisors (1955942).

3911878 is a wasteful number, since it uses less digits than its factorization.

3911878 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1955941.

The product of its digits is 12096, while the sum is 37.

The square root of 3911878 is about 1977.8468090325. The cubic root of 3911878 is about 157.5657305219.

The spelling of 3911878 in words is "three million, nine hundred eleven thousand, eight hundred seventy-eight".