3891072 has 32 divisors (see below), whose sum is σ = 10336680. Its totient is φ = 1296896.

The previous prime is 3891061. The next prime is 3891077. The reversal of 3891072 is 2701983.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (32).

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 3 ways as a sum of consecutive naturals, for example, 4683 + ... + 5450.

Almost surely, 2^3891072 is an apocalyptic number.

3891072 is a gapful number since it is divisible by the number (32) formed by its first and last digit.

It is an amenable number.

3891072 is an abundant number, since it is smaller than the sum of its proper divisors (6445608).

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

3891072 is a wasteful number, since it uses less digits than its factorization.

3891072 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10150 (or 10138 counting only the distinct ones).

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

The square root of 3891072 is about 1972.5800363990. The cubic root of 3891072 is about 157.2858869349.

The spelling of 3891072 in words is "three million, eight hundred ninety-one thousand, seventy-two".