3891288 has 32 divisors (see below), whose sum is σ = 9779760. Its totient is φ = 1290240.

The previous prime is 3891287. The next prime is 3891323. The reversal of 3891288 is 8821983.

It is a Smith number, since the sum of its digits (39) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3891287) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6456 + ... + 7032.

Almost surely, 2^3891288 is an apocalyptic number.

It is an amenable number.

3891288 is an abundant number, since it is smaller than the sum of its proper divisors (5888472).

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

3891288 is a wasteful number, since it uses less digits than its factorization.

3891288 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 867 (or 863 counting only the distinct ones).

The product of its digits is 27648, while the sum is 39.

The square root of 3891288 is about 1972.6347862694. The cubic root of 3891288 is about 157.2887972831.

The spelling of 3891288 in words is "three million, eight hundred ninety-one thousand, two hundred eighty-eight".