3891078 has 20 divisors (see below), whose sum is σ = 8719260. Its totient is φ = 1296972.

The previous prime is 3891077. The next prime is 3891103. The reversal of 3891078 is 8701983.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3891077) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 11848 + ... + 12171.

It is an arithmetic number, because the mean of its divisors is an integer number (435963).

Almost surely, 2^3891078 is an apocalyptic number.

3891078 is an abundant number, since it is smaller than the sum of its proper divisors (4828182).

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

3891078 is a wasteful number, since it uses less digits than its factorization.

3891078 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24033 (or 24024 counting only the distinct ones).

The product of its (nonzero) digits is 12096, while the sum is 36.

The square root of 3891078 is about 1972.5815572493. The cubic root of 3891078 is about 157.2859677793.

The spelling of 3891078 in words is "three million, eight hundred ninety-one thousand, seventy-eight".