3921078 has 24 divisors (see below), whose sum is σ = 9123192. Its totient is φ = 1120224.

The previous prime is 3921059. The next prime is 3921079. The reversal of 3921078 is 8701293.

It is a happy number.

3921078 is a modest number, since divided by 1078 gives 392 as remainder.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3921079) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 6375 + ... + 6962.

It is an arithmetic number, because the mean of its divisors is an integer number (380133).

Almost surely, 2^3921078 is an apocalyptic number.

3921078 is an abundant number, since it is smaller than the sum of its proper divisors (5202114).

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

3921078 is a wasteful number, since it uses less digits than its factorization.

3921078 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13356 (or 13349 counting only the distinct ones).

The product of its (nonzero) digits is 3024, while the sum is 30.

The square root of 3921078 is about 1980.1712047194. The cubic root of 3921078 is about 157.6891554519.

The spelling of 3921078 in words is "three million, nine hundred twenty-one thousand, seventy-eight".