3780891 has 16 divisors (see below), whose sum is σ = 5634720. Its totient is φ = 2505600.

The previous prime is 3780871. The next prime is 3780893. The reversal of 3780891 is 1980873.

It is not a de Polignac number, because 3780891 - 2¹⁵ = 3748123 is a prime.

3780891 is a modest number, since divided by 891 gives 378 as remainder.

It is not an unprimeable number, because it can be changed into a prime (3780893) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5991 + ... + 6591.

It is an arithmetic number, because the mean of its divisors is an integer number (352170).

Almost surely, 2^3780891 is an apocalyptic number.

3780891 is a deficient number, since it is larger than the sum of its proper divisors (1853829).

3780891 is a wasteful number, since it uses less digits than its factorization.

3780891 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 843 (or 837 counting only the distinct ones).

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

The square root of 3780891 is about 1944.4513364957. The cubic root of 3780891 is about 155.7870615444.

The spelling of 3780891 in words is "three million, seven hundred eighty thousand, eight hundred ninety-one".