3911918 has 4 divisors (see below), whose sum is σ = 5867880. Its totient is φ = 1955958.

The previous prime is 3911911. The next prime is 3911923. The reversal of 3911918 is 8191193.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3911911) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 977978 + ... + 977981.

It is an arithmetic number, because the mean of its divisors is an integer number (1466970).

Almost surely, 2^3911918 is an apocalyptic number.

3911918 is a deficient number, since it is larger than the sum of its proper divisors (1955962).

3911918 is a wasteful number, since it uses less digits than its factorization.

3911918 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1955961.

The product of its digits is 1944, while the sum is 32.

The square root of 3911918 is about 1977.8569210132. The cubic root of 3911918 is about 157.5662675707.

Subtracting 3911918 from its reverse (8191193), we obtain a triangular number (4279275 = T₂₉₂₅).

The spelling of 3911918 in words is "three million, nine hundred eleven thousand, nine hundred eighteen".