3891394 has 24 divisors (see below), whose sum is σ = 6555060. Its totient is φ = 1729728.

The previous prime is 3891389. The next prime is 3891403. The reversal of 3891394 is 4931983.

It can be written as a sum of positive squares in 6 ways, for example, as 874225 + 3017169 = 935^2 + 1737^2 .

It is an Ulam number.

It is a nialpdrome in base 13.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 9604 + ... + 10000.

Almost surely, 2^3891394 is an apocalyptic number.

3891394 is a deficient number, since it is larger than the sum of its proper divisors (2663666).

3891394 is a wasteful number, since it uses less digits than its factorization.

3891394 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 454 (or 441 counting only the distinct ones).

The product of its digits is 23328, while the sum is 37.

The square root of 3891394 is about 1972.6616537055. The cubic root of 3891394 is about 157.2902254701.

The spelling of 3891394 in words is "three million, eight hundred ninety-one thousand, three hundred ninety-four".