3777381 has 16 divisors (see below), whose sum is σ = 5777920. Its totient is φ = 2436480.

The previous prime is 3777379. The next prime is 3777391. The reversal of 3777381 is 1837773.

It is a happy number.

It is not a de Polignac number, because 3777381 - 2¹ = 3777379 is a prime.

It is a super-2 number, since 2×3777381² = 28537214438322, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3777311) 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, 1420 + ... + 3093.

It is an arithmetic number, because the mean of its divisors is an integer number (361120).

Almost surely, 2^3777381 is an apocalyptic number.

3777381 is a gapful number since it is divisible by the number (31) formed by its first and last digit.

It is an amenable number.

3777381 is a deficient number, since it is larger than the sum of its proper divisors (2000539).

3777381 is a wasteful number, since it uses less digits than its factorization.

3777381 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4553 (or 4547 counting only the distinct ones).

The product of its digits is 24696, while the sum is 36.

The square root of 3777381 is about 1943.5485586936. The cubic root of 3777381 is about 155.7388381772.

The spelling of 3777381 in words is "three million, seven hundred seventy-seven thousand, three hundred eighty-one".